What is required to make a resting object move or a moving object change speed or direction?

12. A boy of mass 50 kg running 5m/s jumps on to a 20kg trolley travelling in the same direction at 1.5m/s. Find their common velocity. Assume that there is no external unbalanced force working in the horizontal direction.

Signs that say "do not use near an open flame" refer to a (n) A) energy property. B) chemical property. C) physical property. D) mechanical property.

The process in which nuclei with small masses are combined to form a nucleus with a larger mass.

A girl is standing still in the middle of a baseball field. The girl catches the baseball and begins to move in the same direction as the thrown ball. What type of collision is being described?

A car traveling at 27 m/s starts to decelerate steadily. It comes to a complete stop in 5 seconds. What is its acceleration?

What is the relationship between the mass and period in a mass hanging on spring oscillation and why?

Saturn's moon Titan has a mass of 1.35 * 1023 kg. If Titan is 1.19 * 106 km from Saturn, and Saturn's mass is 5.86 * 1026 kg, what is the gravitational force between Saturn and its moon? 2.76 * 104 N 3.29 * 107 N 3.73 * 1021 N 4.43 * 1030 N

What has occured when bubbles form in a liquid that is being heated

What would happen to the supply of ATP in your cells if you did not eat enough carbohydrates?

According to a rule-of-thumb, every 5 seconds, between a lightning flash and the following thunder gives the distance to the flash in miles.