Forces and Laws...

In the graph below is given the variation of force with time. Find out the net change in momentum of the object.

From a stationary tank of mass $$125000$$ pound, a small shell of mass $$25$$ pound is fired with a muzzle velocity of $$1000\ ft/sec$$. The tank recoils with a velocity of ..........

When a body is stationary 

When two bodies A and B interact with each other, A exerts a force of $$10N$$ on B towards east. What is the force exerted by B on A?

In accordance with Newton's third law of motion 

 A person in a car tends to fall back when it suddenly starts. It is due to

Newton's $$2nd$$ law explain us

Rahul is traveling in a bus on a straight road facing in the direction of the motion of the bus. If the bus starts accelerating in the same direction then Rahul will fall 

A boy who normally weigh $$200 \ N$$ on a spring scale suddenly jump upwards. The scale reading jumps to $$400 \ N$$. What is boy's maximum acceleration upwards? $$(g=9.8m/s^2)$$

A car is moving with $$15\ ms^{-1}$$ whose mass is $$1500\ kg$$. Find the momentum of the car.