calculate the kinetic energy of

Question

a. A 1kg trolley traveling at 2m/s.
b. A 2g (0.002kg) bullet traveling
at 400m/s.
c. A 500kg car traveling at 72km/h.

Answer 1

KE= 1/2 mass* velocity^2

Do you have any questions on how to do that? Mass is in kg, velocity in m/s, and energy will be in joules.

Answer 2

56

Answer 3

0967774956

Answer 4

I want answers

Answer 5

a. kinetic energy of a trolley= 1/2*m*v^2
= 1/2*1*2^2
=2J
b. kinetic energy of a bullet= 1/2*0.002*400^2
= 160J
c. v= 72km/s =72000/3600 =20m/s (SI unit)
kinetic energy of a car= 1/2*500*20^2
= 100000J