Question

A 10-Newton object moves to the left at 1 m/s. Its kinetic energy is approximately _____ Joules.

 

a. 0.5

b. 1

c. 10

d. more than 10

Answer 1

The kinetic energy

$$E_k=\frac{mv^2}{2}=\rm\frac{1\: kg*(1\: m/s)^2}{2}=0.5\:J$$

Answer: a