A ball is dropped from a 100-m tall building. Neglecting air resistance, what will the speed of the ball be when it reaches the ground 4.5 seconds later?

Is work being done if you push a child in a wagon

Which results in an increase in power? A - doing more work in less time? B - doing more work in more time? C - doing less work in more time? D-doing less work in less time?

A 50kg box is pulled on by a rope. The rope applies a horizontal force of 180 N to the box. What is the normal force exerted on the box by the floor?

The Kelly family and the Garcia family each used their sprinklers last summer. The water output rate for the Kelly family's sprinkler was 35L per hour. The water output rate for the Garcia family's sprinkler was 20L per hour.

A bubble at the bottom of the lake to the surface within 10.0 seconds what is the depth of the lake

A 1100 kg car rounds a circular turn of radius 24.6 m. Of the road is flat and the coefficient of static friction between the tires and the road is 0.59, how fast can the car go without skidding

What is the momentum of a 15 kg tire rolling down a hill at 3 m/s? 5 kg • m/s 18 kg • m/s 45 kg • m/s 60 kg • m/s

Which of Newton's laws, when combined algebraically with his law of universal gravitation, can be used to calculate Earth's mass? A) first B) second C) third

Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not? A. Helium has no mass, but air does. B. Helium increases the balloon's mass more than air. C.

Consider the following controls in an automobile in motion : gas pedal, brake, steering wheel. what are the controls in this list that cause an acceleration of the car?