Force and Motion

Area under velocity - time graph represents

A particle is moving in a circular path of radius r. The distance after half a circle would be

A car accelerates uniformly from from 5m/s to 10 m/s in 5s. Calculate the distance covered by the car in that time.

The brakes applied to a running train produce an acceleration of 0.6 m/s² in a direction opposite that of motion. If train takes 60s to stop after application of brakes, calculate distance travelled before coming to rest.

A racing car at rest accelerates uniformly to a velocity of 144 km/hr in 20 s. Find value of acceleration of the car.

Why do athletes put some sand or cushion on the ground while jumping?

Two objects, each of mass 1 kg are moving in the same straight line but in opposite directions. The velocity of each object is 3 m/s before the collision during which they stick together. What will be the velocity of combined object after collision?

The momentum of an object depends on what two things.

A body of mass 1 kg is kept at rest. A force of 6N acts on it, Find the time taken by body to move through a distance of 12 m.

Momentum means .....

An object's inertia depends on the _______________of the object.

A bullet of mass 20 g is horizontally fired with a velocity 150 m/s from a pistol of mass 2 kg. What is the recoil velocity of the pistol?

Starting from a stationary position, Satvik attain a velocity of 20 m/s in 4 s, while competing for a race. Calculate his acceleration during the period. Assume the acceleration to be unifrom.

Which law explains how rockets are launched into space?

A soccer ball accelerates more than a bowling ball when thrown with the same force. What law is this an example of?

Pushing a child on a swing is easier than pushing an adult on the same swing. What law is this an example of?

A person's body is thrown outward as a car rounds a curve on a highway. What law is this an example of?

If the gymnast decreases the force they exerts on the trampoline, what will the reaction be?

A racing car has an uniform acceleration of 4 m/s^2. What distance will it travel in 10s before coming to rest.

If you apply MORE force to the ground what happens to the ground pushing on you?

A spring balance has 5 marks between 10g to 20g.What is it's least count and range?

A car driver driving at a speed of 90km/hr applies brakes and brings car to rest in 20s. The acceleration of car is

Which force is shown in the picture? (look at he brakes being used on the roller blades)