Decide whether each of these statements is True (T) or False
A hammer of mass 2 kg is moving with a velocity of 4 m/s when it hits a nail. If it comes to rest in 0.1 s:
(i) The momentum of the hammer before hitting the nail is 8 kg m/s.
(ii) The force acting on the nail when hit by the hammer is 8 N.
A) (i) T (ii) T
B) (i) T (ii) F
C) (i) F (ii) T
D) (i) F (ii) F

Question

Quizplus · Accepted Answer

(i) True because momentum = mass × velocity = 2 kg × 4 m/s = 8 kg m/s. (ii) False because force = change in momentum / time = (8 kg m/s - 0) / 0.1 s = 80 N.

Decide Whether Each of These Statements Is True (T) or False