FORCE AND MOTION 2 Comments / Uncategorized / By buzzerkings 87 Created on May 13, 2023 By buzzerkingsForce and Motion Phy 1 / 70 The product of force and time is equal to: Angular momentum Force Change in momentum Velocity 2 / 70Which one of the following is the angle of projection of a projectile if its range is equal to its height? 48 90 76° 60 3 / 70The newton second is unit of: Work Power Momentum Impulse 4 / 70If we drop an object, its initial velocity is zero. How far will it fall in time “t” 4.9t^2 9.8t^2 98t^2 0.49t^2 5 / 70At what angle of projection of a projectile the range becomes half of its maximum value? 40 degree 20degree 15degree 30 degree 6 / 70The slope of distance time graph will always be: Positive Negative zero Maximum 7 / 70The range of the projectile depends upon the velocity of the projection and the angle of the projection ir 450. For a fixed velocity, when the angle of projection is larger than 450. Which of the following is correct? both the height and the range attained by the projectile will be more The height attained by the projectile will he less but the range is more The height attained by the projectile will be more but the range is less both the height and the range attained by the projectile will be less 8 / 70 For projectile motion in the absence of air resistance: horizontal force is constant vertical speed is constant vertical acceleration is zero horizontal acceleration is zero 9 / 70 If two objects of equal masses 'm' are moving towards each other with the same speeds’v’ Then what will be the total final momentum after elastic head-on collision? 2 mv kg/s mv kg m/s .0 kg m/s mv kg/s 10 / 70Two trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and v respectively. These trucks collide and stick together. What is the speed of the trucks after the collision? v/4 5v/4 v v/2 11 / 70Newton first law of motion is also known is Law of electromagnetism Law of inertia Law of conservation Law of universal gravity 12 / 70A cyclist is traveling at 15ms-1 she applies brakes so that she doesn't collide with the wall in front of her distance of 18m. Calculate the magnitude of deceleration. 12.5ms-2 5.3ms-2 13ms-2 6.3ms-2 13 / 70 If slope of velocity time graph is not constant at different points, then body is moving with Increasing acceleration Constant acceleration Average acceleration Uniform velocity. 14 / 70A bullet of mass m moving with a velocity v is fired into large wooden block of mass M of the bullet remains embedded in the wooden block, the velocity of the system will be: M/ M+m v m/ M-m v m/ M+m v M/ M-m v 15 / 70The numerical ratio of displacement to distance is: Always equal to one Always more than one Always less than one Equal to or less than one 16 / 70The value of ratio of displacement to distance is: Always less than one Equal or less than one Always one More than one 17 / 70 The distance travelled by a moving car with velocity 15 m/s in 2 seconds, decelerates at 2m/s2 is equal to 26m 34m 16m 30m 18 / 70Arshad is driving down 7th street. He drives 150 meter is 18 seconds. Assume he does not speed up or slow down. What is his speed? 8.33m/s 58.33m/s 0.38m/s 126m/s 19 / 70The ratio of displacement along diameter and total distance along circle: л: 2 π :1 1:π 2: π 20 / 70Weight rather than mass be used in calculating The stress in wire due to load hanging from it Moment of inertia of a body The binding energy of the nucleus The gravitational force between the two bodies 21 / 70A projectile is launched at 45° to the horizontal with initial K, Energy, E. Assuming air resistance to be negligible, what will be the kinetic energy of the projectile when it reaches its highest point? 0.87E 0.71E E 0.50E 22 / 70A ball is dropped from the roof of a very tall building. What is its velocity after falling for 5.0s? 1.96 ms-1 49.0 ms-1 9.80 ms-1 98.0 ms-1 23 / 70One ball is thrown vertically upward with a velocity of 9.8 m/s. If the takes 10 seconds to reach the highest point, then the acceleration of the ball is 98ms^-2 980 ms^-2 9.8ms^-2 9.8ms^-2 24 / 70For finding the height of projectile, the equation used is: a= 2S (vf^2-vi^2) 2aS=vf^2-vi^2 S = 2a (vf^2-vi^2) 2S= a (vf^2-vi^2) 25 / 70 If the velocity of the body changes by equal amount in equal intervals of time, the body is said to have: Negative acceleration Uniform acceleration Uniform velocity Variable acceleration 26 / 70Time of projectile's flight is vi^2sin𝚹/g vi^2sin^2𝚹/g 2v, sin𝚹/g. v^2sin^2 𝚹 27 / 70 If a force of 12N is applied on a body and its momentum is changed form 60 kgms-1 to 36kg ms-1, then find the time during, which this force acts: 12 seconds. 1 second 24 seconds 2 seconds 28 / 70In clastic collision, when a massive body collides with light body at conditions m1>> m2 and v2=0 m/s, then the change in velocity will be written as: V1’= -v1; V2'= 0 v1’= v1; v2’ = 0 V1’=-v1’ ; V2’= V1 v1’=v1; v2’=2v1 29 / 70 A body is moving with an initial velocity of 2 kms^-1. After a time of 50 secs its velocity becomes 1.5 kms^-1. Its acceleration will be: 10 ms^-2 40 ms ^-2 20 ms^-2 30 ms^-2 30 / 70 An____missile is called a ballistic missile. Powered and guided Un-powered and un-guided Un-powered and guided Un guided and powered 31 / 70The vertical velocity of ball thrown upward with time. . Decreases linearly Remains constant Doubles Decreases parabolically 32 / 70A particle moves along the straight line. The distance x describes in time, t is given by the equation x= t^3 the acceleration at t=1 A = 4 A= 3 A =1 A =2 33 / 70A ball is just allowed to fall from the window of a moving train, it will hit the ground following. Circular path Parabolic path Hyperbolic Straight line path 34 / 70 For which of the following angles range is maximum? None 43° 30° 60° 35 / 70A projectile is fired horizontally with an initial speed of 20 m/s. Its horizontal speed 3s later is 6.67 m/s 20 m/s 29.4 m/s 60 m/s 36 / 70The path followed by a projectile is known as its Cycle Height Trajectory Range 37 / 70Two projectiles are projected at angle of 20 and 70° with same velocity which one have longer range Which is fired at 20° Which is fired at 70° None of these Both have same range 38 / 70Time taken by a projectile to reach maximum height is t = 2v,sin𝛉/g visin𝛉/g visin𝛉/2g visin2𝛉/ g. 39 / 70At maximum height on the trajectory which of projectile becomes zero Vertical velocity Velocity Horizontal velocity Acceleration 40 / 70 Which shows the correct relation between time of flight T and maximum height HI? H= 8/gT^2 H=gT^2/ 8 H= 8g/T^2 H=8T^2/E 41 / 70 A handball is tossed vertically upward with a velocity of 19.6 meters per second, Approximately how high will it rise? 20 m 15 m 30 m 25 m 42 / 70A shell explodes into four unequal parts. Which one of the following is conserved? Kinetic energy Momentum Both potential and kinetic energy Potential energy 43 / 70 When a very heavy ball 'B1' collide with a stationary target 'B2' of negligible mass, after collision the final velocity of ball 'B2' will Same as the B₁ Become half Become zero Become doubled as compared to B₁ 44 / 70The collision between the two bodies is elastic if bodies are? Solid and hard Solid and soft Hard and elastic Soft and clastic 45 / 70Two railway trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and v respectively. These trucks collide and stick together. What is the speed of the trucks after the collision? v/2 v 5v/4 v/4 46 / 70A player takes 0.1 s in catching a ball of mass 150 g moving with velocity of 20 m/s. The force imparted by the ball on the hands of the player is: 0.3 N 30 N 300N 3 N 47 / 70 A gun after firing recoils due to Conservation of momentum . Newton's first law of motion Backward thrust of gases produced Conservation of energy 48 / 70 A force of 100 Dynes acts on mass of 5g for 10 sec. The velocity produced is___ 2000 cm/sec 20 cm/sec 2 cm/sec 200 cm/sec 49 / 70A force of 6N acts on a mass of 1kg which acquire velocity of 30ms^-1. The time for which the force acts 26 s 2 s 5 s 6 s 50 / 70 In which of the following cases forces may not be required to keep the The momentum of the particle constant Acceleration of the particle constant Particle going in a circle Particle going along a straight line 51 / 70The average force necessary to stop a hammer with 25 N s momentum in 0.05 s expressed in 'N' Is 500 50 25 125 52 / 70Which is a statement of the principle of conservation of momentum? The total momentum of a system of interacting bodies remains constants, providing no external force acts In a perfectly elastic collision, the relative momentum of the bodies before impact is equal to their relative momentum after impact A force is equal to the rate of change of momentum of the body upon which it acts. The momentum of a body is the product of the mass of the body and its velocity 53 / 70When a force of 4 N acts on a mass of 2 kg for a time of 2 sec, what is the rate of change of momentum? 4 kg ms^-2 8 kg ms^-2 2 kg ms^-2 16 kg ms^-2 54 / 70A Force of 12 N gives an object an acceleration of 4 m/s^2. The force required to give it an acceleration of 10 ms^+2 is 25 N 15 N 20 N 30 N 55 / 70Which law of motion defines force? All of these 1st law 2nd Jaw 3rd law 56 / 70A mass of 10 kg moves with an acceleration of 10 m s2, the force on it is 100 N 25 N 50 N 5 N 57 / 70When force of 1 N is applied on a body of mass 100 g then the acceleration would be 5 m s^-2 0.5 m s^-2 10 m s^-2 0.1 m s^-2 58 / 70 If the force neting on a body is doubled, then neceleration becomes One fourth Half Constant Doubled 59 / 70 If the slope of a velocity time graph gradually decrenses, then the body is said to be moving with . Positive acceleration None of these Negative acceleration Uniform velocity 60 / 70A man leaves his house for a cycle ride. He comes back to his house after half an hour after covering a distance of one km. What is his average velocity for the ride? 1/2 km per hour 0 2 km per hour 1/2 km per second 61 / 70A body can have constant velocity when it follows a. Elliptical path Circular path Rectilinear path Parabolic path 62 / 70 A man in a car moving with velocity of 36 km/hr. His speed with respect to the car is 10 m/s 36 m/s Infinite Zero 63 / 70Two cars are moving in opposite directions with speed v. What is the magnitude of their relative velocity? 2v 0 v v/2 64 / 70The shortest distance between two points is called Speed Acceleration Velocity Displacement 65 / 70Length of the path of a particle is equal to the magnitude of the displacement of that particle. Shape of the path possible Parabola Circle Straight line Are of a circle 66 / 70A particle goes from x= -2m, y= 3m, z= 1m to x= 3m, y= -1m, Z = 4m. Its displacement is: (5m)î - (4m)ĵ +(3m)ǩ -(5m)î +(4m)ĵ -(3m)ǩ (1m)î+(2m)ĵ+(5m)ǩ -(1m)î -(2m)ĵ -(S)ǩ 67 / 70Consider the acceleration, velocity and displacement of a tennis ball as it falls to the ground and bounces back. Directions of which of these changes in the process Decrease in speed per unit time Decrease in velocity per unit time Increase in speed per unit time . Velocity only 68 / 70The retardation is defined as Increase in speed per unit time Increase in velocity per unit time Decrease in velocity per unit time Decrease in speed per unit time 69 / 70If an object is moving with constant velocity of 20ms towards north then its acceleration will be 0ms^-2 5 ms^-2 10ms^-2 9 m² 70 / 70A Body moves 6 m north. 8 m east and 10m vertically upwards, what is its resultant displacement from initial position 10/√2m 10x 2m 10√2m 10 m Your score isThe average score is 37% LinkedIn Facebook Twitter VKontakte 0% Restart quiz

Emaan July 20, 2023 at 10:46 pmAssalamualaikum only if I can get solution to these mcqs would be really helpful as without solution it is quite difficult to understand Reply

EmaanAssalamualaikum only if I can get solution to these mcqs would be really helpful as without solution it is quite difficult to understand

buzzerkingswe will soon provide explanation to the mcqs