A typical world-class male sprinter will accelerate to his maximum velocity in 4.0 s. If the runner covers a distance of 55 m in that time, what is his acceleration?
State the numeric value to the correct number of significant figures?

The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.

An object in mechanical equilibrium is an object