Physics Laws of Motion Numerical3c
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Q1 A body of mass 5kg is moving with velocity 2m/s. Calculate its linear momentum.
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Q2 The linear momentum of a ball of mass 50g is 0.5kg m/s. Find its velocity.
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Q3 A force of 15N acts on a body of mass 2kg. Calculate the acceleration produced.
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Q4 A force of 10N acts on a body of mass 5kg. Find the acceleration produced
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Q5 Calculate the magnitude of force which when applied on a body of mass 0.5kg produces an acceleration of 5m/s2 .
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Q6 A force of 10N acts on a body of mass 2kg for 3s, initially at rest. Calculate: (i) the velocity acquired by the body, and (ii) change in momentum of the body
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Q7 A force acts for 10s on a stationary body of mass 100kg after which the force ceases to act. The body moves through a distance of 100m in the next 5s. Calculate: (i) the velocity acquired by the body, (ii) the acceleration produced by the force, and (iii) the magnitude of the force.
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Q8 Figure shows the velocity-time graph of a particle of mass 100g moving in a straight line. Calculate the force acting on the particle.
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Q9 A force causes an acceleration of 10m/s2 in a body of mass 500g. What acceleration will be caused by the same force in a body of mass 5kg?
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Q10 A force acts for 0.1s on a body of mass 2kg initially at rest. The force is then withdrawn and the body moves with a velocity of 2m/s. Find the magnitude of force.
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Q11 A body of mass 500g, initially at rest, is acted upon by a force which causes it to move a distance of 4m in 2s, Calculate the force applied
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Q12 A car of mass 480kg moving at a speed of 54km/h is stopped by applying brakes in 10s. Calculate the force applied by the brakes.
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Q13 A car is moving with a uniform velocity of 30m/s. It is stopped in 2s by applying a force of 1500N through its brakes. Calculate: (a) the change in momentum of car, (b) the retardation produced in car, and (c) the mass of the car.
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Q14 A bullet of mass 50g moving with an initial velocity of 100m/s , strikes a wooden block and comes to rest after penetrating a distance 2cm in it. Calculate : (i) initial momentum of the bullet (ii) final momentum of the bullet, (iii) retardation caused by the wooden block, and (iv) resistive force exerted by the wooden block
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