Question

For each of the following statements determine whether it is correct or incorrect.

Answer 1

Answer:

a) T; b) F; c) F; d) T; e) T; f) T

Explanation:

a) True, since the equation of work done on a spring is $\frac{kx^2}{2}$

b) False, it will be only mgh.

c) False, since it is $mv^2$, no direction involved.

d) True, since the measured speed of objects depends from the reference frame of the observer.

e) True, since its formula is $mv^2$ and both terms are positive.

f) True, since the centripetal force the Earth feels, which is the gravitational atraction the Sun exerts, is perpendicular to its circular trajectory.