Question

1. A ball of mass 200 g is in motion along a straight line with a velocity of 81 km h-? What is its momentum?
2. Calculate the velocity of a toy car of mass 250 g so as to have a momentum of 0.05 kg m s -1
3. How much force is needed to accelerate an object of mass 3.5 kg with uniform acceleration of 4.0 m s-??
4 A car starts from rest and under a constant accelerating force, it acquires a velocity of 3 m s-l in 5 seconds. If
mass of a car and passengers be 1800 kg, calculate the magnitude of force.
5. Kashvi riding a scooter, moving with a velocity of 72 km h, applies brakes so that it is stopped in 8 s. Calculate
the force exerted by the brakes of the scooter. Given that mass of scooter and Kashvi, taken together, is 170 kg.
6. Engine of a train exerts a force of 6000 N. If total mass of the train and the engine be 18000 kg, and initially the
train was standing on the platform, what is the magnitude of velocity attained by the train 20 s after the start?
Assume that there is no frictional force between railway track and the train and motion is in a horizontal direction.
A loaded truck starts from rest and rolls down a hilly road with a constant acceleration. The truck travels a
distance of 1 km in 60 s. What is its acceleration? Find the magnitude of net force acting on the truck if its mass
is 7200 kg
8. Which would produce a greater acceleration, a force of 6.6 N in a body of mass 12 kg or a force of 1.2 N in a
body of mass 2.8 kg?​

Answer 1

Explanation:

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