What does friction oppose

A trebuchet wasa hurling machine builtto attackthe walls of a castle under siege. A large stone could be hurled against a wall to break apart the wall. The machine was not placed near the wall because then arrows could reach itfrom the castle wall.

Whish is a drawback of solar energy? A. It is a non renewable source B. It depends on the climate C. It is difficult to use for electricity D. It can be a source of water pollution

Select all of the answers that apply. Which of the following are beneficial products of volcanic activity? A. The Hawaiian Islands B. Fertile Soil C. Geothermal Energy D. Ring of Heat

What phenomena provides evidence of electric fields in the atmosphere

A skydiver finds that she speeds up when she holds her arms close to her body. What does this do? A. It increases the force of gravity. B. It reduces the force of gravity. C. It increases the force of air resistance D.

The combustion of fuel in a piston cylinder causes an internal energy change of - 2836 kJ. The components surrounding the cylinder absorb 963.6 kJ of heat. How much work can be done by the fuel on the piston in the cylinder?

A car travelling at 20 m/s due north along the highway makes a right turn on to a side road that heads due east. It takes 50 s for the car to complete the turn. At the end of 50 s, the car has a speed of 15 m/s along the side road.

We see a full moon by reflected sunlight. how much earlier did the light that enters our eye leave the sun

What is energy at motion called

How far would a baseball travel in 0.5 s if it is thrown at a speed of 20 m/s? 40 s 10 m O 10s 40m