Consider a body with mass m ,its momentum proportional to :
Speed
Volume
Density
Shape
A gun of mass 5kg fires a 50g bullet with velocity 200 m/s.Calculate the recoil velocity of gun ?
2 m/s
20 m/s
0.2 m/s
Zero
From a rifle of mass 4 kg,a bullet of mass 50 g is fired with an initial velocity of 35 m/s. Calculate the initial velocity of the recoil of gun ?
0.4598 m/s
0.4375 m/s
0.4785 m/s
0.4578 m/s
A force acts on a particle of mass 200 g. The velocity of the particle changes from 15m/s to 25 m/s in 2.5s. Assuming the force to be constant,its magnitude is :
0.4 N
0.6N
0.8N
0.5 N
Force is the rate of change of :
Mass
Velocity
Momentum
Acceleration
If A and B are two objects with masses 6 kg and 34 kg respectively,then
A has more inertia than B
B has more inertia than A
A and B have same inertia
none of the two has inertia
A canon after firing recoils due to :
Conservation Energy
Backward thrust of gases
Newton’s third law of motion
Newton’s first law of motion
A bullet of 10 g strikes a sandbag at a speed of 103 m/s and gets embedded after travelling 5 cm. Calculate the resistive force exerted by the sand on the bullet ?
105 N
108 N
107 N
106 N
Calculate the force required to impart a velocity of 30 m/s to a car in 10 seconds starting from rest.The mass of the car is 1500 kg.
4500 N
4550 N
4300 N
4950 N
A hockey ball of mass 200g travelling at 10m/s is struck by a hockey stick so as to return it along its original path with a velocity of 5m/s. Calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick ?
3 Ns
-3 Ns
4 Ns
-4 Ns