Write relationship between force, mass and acceleration
F = ma
F = ma2
A cricket ball of mass 100g moving with a speed of 30ms-1 is brought to rest by a player in 0.03s. The change in momentum of ball is
-3.0 kgms-1
0
2kgms-1
none of these
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 monkey of mass 40kg climbs on a rope which can stand a maximum tension of 600N. In which of the case the rope break the monkey.
climbs up with an acceleration of 6ms-2
climbs down with acceleration of 4ms-2
climbs up with a uniform speed of 5ms-1
falls down the rope nearly freely under gravity.
A constant retarding force of 50N is applied to a body of mass 20 kg moving initially with a speed of 15ms-1. How long does the body take to stop?
6 s
10 s
12 s
18 s
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 body weighs most
at the earths surface
above the earths surface
inside the earth
at the centre of earth
A bullet of mass 0.04 kg moving with a speed of 90ms-1 enters a heavy wooden block and is stopped after a distance of 60cm. What is the average resistive force exerted by the block on the bullet?
250N
260N
270N
300N
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
1.5 N
6.5 × 103 N
