The earth exerts a gravitational force on the moon. the moon exerts a gravitational force on the earth. how do the magnitudes of these two forces compare? note that the mass of the earth is 81 times the mass of the moon.

True or false. sliding friction is stronger than static friction

A 4 kg bowling ball accelerates 1 m/s2. what is the net force on the ball?

A cyclist accelerates from 0 m/s [S] to be 15 m/s [S] in 4 s. What is his acceleration?

A projectile is launched at an angel into the air its verticle acceleration is g?

Describe what it means to view something from a frame of reference

What does the slope of the line on this velocity versus time graph represent? A. positive deceleration B. zero acceleration C. positive acceleration D. negative acceleration

Which of the following objects has the greatest kinetic energy? a baseball flying through the air at 90 miles per hour a baseball flying through the air at 45 miles per hour a baseball flying through the air at 20 miles per hour a baseball sitting

Peter found an amazing fact in an amusement park when he tried to ride the Magic Mountain Superman. Powerful magnets accelerate a car and its riders from zero to 45 m/s in 7 seconds. Suppose the mass of the car and riders is 5,600 kg.

The formula s = 16t2 gives the distance an object falls due to gravity, where s is the distance in feet and t is the time in seconds. how many feet will the object fall in 6 seconds?

Consider equal volumes (say 1 l of a given substance in the solid, liquid, and gas phases. arrange them in order of decreasing mass based on the trend for the average substance.