Question

Q1. What magnitude of force will change the bring a body of mass 1 kg moving at a speed of

30m/s to rest in 5 sec.

(a) 1 N (b) 6 N (c) 10 N (d) 25 N​

Answer 1

Answer:

force = mass × acceleration

Explanation:

mass = 1 kg

acceleration speed relation

V = Vo + a⋅t

Explanation:

Where:

V = speed = 30 m/sec

Vo = Initial speed = 0 m/sec

a = acceleration = x

t = time= 5 sec

30 = 0 + 5 x

30/5 = x

x = 6 m/s^2

force= 1 × x

= 1 × (6)

= 6 N