Question

Calculate the k.e. of a:
a. 1 kg trolley travelling at 2 m/s,
b. a 2 g (0.002 kg) bullet travelling at 400 m/s,
c. a 500 kg car travelling at 72 km/h.

how do i do the working out?

Answer 1

Answer:

Just use the formula for K.E

Explanation:

Kinetic energy = 1/2 mv^2

where m = mass and v = velocity.

THANK YOU

Answer 2

Explanation:

a) KE=1/2=1/2 mv^2 =1/2 x kg x (2 m/8)^2 =2J

b)KE=1/2 x 0.002kg x (400 m/8)^2 =160J

c)KE=1/2 x 50kg (72 km/h x 1000m/1km x 1h/3600s)^2 =1000J

hope it helps you :)