Jai tutorials ( Law of motion )

Jai tutorials ( Law of motion )

3 marks

Two identical billiard balls strike a rigid wall with the same speed but at different angles, and get reflected without any change in speed, as shown in Fig.  What is

 (i) the direction of the force on the wall due to each ball?

 (ii) the ratio of the magnitudes of impulses imparted to the balls by the wall ? 

Open Ended

3 marks

Show that

 $F\ =\frac{\text{d}p}{\text{d}t}$  by the second law of motion and also prove  $F=\ ma$  by the above formula .

3 marks 

Determine the maximum acceleration of the train in which a box lying on its floor will remain stationary, given that the co-efficient of static friction between the box and the train’s floor is 0.15.

Open Ended

5 marks

Prove that during a circular curve a vehicle should have tha max. speed of  $v\ _{\max}=\sqrt{\mu_sRg}$  

3 marks

A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 m s-2. Calculate the initial thrust (force) of the blast

3 marks 

A body of mass 20kg is resting on a smooth table and light strings attatched to it and passed over a smooth pulley at the edge of the table . A mass of 3 kg is attached at the free end. what is the acceleration of the system ?