Compared to some original speed, how much work must the brakes of a car supply to stop a car moving four times as fast? How will the stopping distance compare?

Suppose you push a toy train with a force of 3 N east. The train has a mass of 0.5 kg. What is its acceleration? A. 0.17 m/s2 east B. 1.5 m/s2 east C. 6 m/s2 east D. 30 m/s2 east

You drop a ball from the top of a building, how long does it take to reach the ground

Acids are described as corrosive because they

An element's atomic number is 58. How many protons would an atom of this element have?

Which of the following describes a training program that involves a variety of activities? A. progressive training B. cross-training C. overtraining D. multitraining

What types of exercises for stomach

Which states the law of conservation of energy? A. Energy cannot be created or destroyed, but it can be converted or changed into different forms. B. Energy can be created or destroyed, and it can be converted or changed into different forms. C.

What is density? How can you find density?

A 15 kg child experiences an acceleration of 0.25 m/s2 as she is pulled 1.7 m horizontally across the floor by her sister. what is the change in the child's kinetic energy?

A piece of candy has 5 calories (or 5000 calories). if it could be burned, leaving nothing but carbon dioxide and water, how much heat would it give off?