A hammer of mass 1 kg moving with a speed of 6 ms-1 strikes a wall and

1.	A hammer of mass 1 kg moving with a speed of 6 ms-1 strikes a wall and comes to rest in 0.1 s. Find the1. Impulse2. Retarding force on the hammer3. Retardation
Answer» 1. The initial momantum of the hammer is, m × v = 1 kg × 6 ms^-1 = 6 kg ms^-1 = 6 Ns Impulse = F. t = Δ P = 0 – mv = – 6 Ns. 2. The force on the hammer F = Impulse/time = 6Ns/0.1s = 60 N. 3. Retardation = a = F/m = 60N/1kg = 60 ms^-2.

A hammer of mass 1 kg moving with a speed of 6 ms-1 strikes a wall and comes to rest in 0.1 s. Find the1. Impulse2. Retarding force on the hammer3. Retardation

Answer»

1. The initial momantum of the hammer is,

m × v = 1 kg × 6 ms^-1

= 6 kg ms^-1

= 6 Ns

Impulse = F. t = Δ P

= 0 – mv

= – 6 Ns.

2. The force on the hammer

F = Impulse/time

= 6Ns/0.1s

= 60 N.

3. Retardation = a

= F/m

= 60N/1kg

= 60 ms^-2.