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
When the glass vessels fall on a hard floor they break, but they do not break when the fall on a carpet or sand. Which law is used?
Newton's 1st law
Newton's 2nd law
Newton's 3rd law
law of conservation of momentum
A body weighs most
at the earths surface
above the earths surface
inside the earth
at the centre of earth
Write relationship between force, mass and acceleration
F = ma
F = ma2
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 linear momentum of body of man in moving with velocity v is
v/m
m/v
mv
1/mv
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