The linear momentum of body of man in moving with velocity v is
v/m
m/v
mv
1/mv
A bullet of mass m, is fired into a large block of wood of mass M with velocity v. The final velocity of the system is
v/(M + m)
v(M + m)/m
(mv/M)
mv/(M + m)
The driver of a three-wheeler moving with a speed of 36km|hr sees a child standing in the middle of the road and brings his vehicle to a rest in 4.0 s just in time to save the child. What is the average retarding force on the vehicle? The mass of three-wheeler is 400 kg and the mass of driver is 65 kg.
1.2 × 103 N
0
1.5 N
6.5 × 103 N
Linear momentum of a ball of mass 5 g is 0.5 kg ms-1.Calculate the velocity.
10ms-1
5ms-1
15ms-1
A stream of water flowing horizontally with a speed of 15ms-1 gushes out of a tube of cross sectional area 10-2m2 and hits a vertical wall nearby. What is the force exerted on the wall by the impact of water, assuming it does not rebound?
2 × 103 N
6 × 103 N
2.25 × 103N
zero
A bat man hits back a small straight in the direction of the bowler without changing its initial speed of 12ms-1 of the mass of the ball is 0.15kg determine the impulse impacted to the ball.
3 Ns
3.2 Ns
5 Ns
3.6 Ns
A bats man deflect a ball by an angle of 45o without changing its initial speed which is equal to 54km|hr Mass of ball is 0.15kg. What is the impulse imparted to the ball?
4.2 kgms-1
5 kgms-1
10kgms-1
15 kgms-1
If an elevator is moving vertically up with an acceleration a, the force exerted on the floor by a passenger of mass M is
Ma
M(g + a)
M(g - a)
Zero