A large crate is pushed to the right along a rough surface by a
320 N applied force. The friction force due to the surface
is 100 N, and the mass of the box is 40 kg. Determine the
net force acting on the crate.
A. 400 N
B. 320 N
C. 100 N
D. 220 N

Use the ratio form of kepler’s third law, = , and the data provided to determine the time it takes mars to orbit the sun. round your answer to the nearest tenth. earth’s orbital period = 1.0 earth year earth’s distance from the sun = 1.0 au mars’s distance from the sun = 1.5 au it takes mars about ⇒ 1.8 earth years to orbit the sun.