Class 9

Science

Physics

Force and laws of motio

A cyclist covers the distance of 6 km in 15 minutes. Find his speed?

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Two balls M and N of masses 3g and 6g are in motion with velocities 2m/s and 1 m/s respectively. Their momenta are in the ratio:

A water tanker filled up to 2/3 of its height is moving with a uniform speed On sudden application of the brake, the water in the tank would

A large truck and a car, both moving with a velocity of magnitude v, have a head-on collision and both of them come to halt after that. If the collision lasts for 10 s then$(i)Thecarwillexperiencethegreaterforceofimpactexertedbythetruck$(ii) The truck will experience the greater momentum change$(iii)Carwillexperiencethegreateravera≥ae≤rationthantruck.$

A ball is rolling down a slope at a steady speed. Which of the following statements is correct?

A car weighing 1000 kg moving with a velocity of 40 m/s retards uniformly coming to rest in 10 s. Calculate the initial momentum of the car.

In a rocket, fuel burns at the rate of 1 kg s−1. This fuel is ejected from the rocket with a velocity of60 km s−1. This exerts a force on the rocket equal to

The force F acting on a particle of mass m is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is

What would be the final velocity of a body if it comes to the rest?