How does a centripetal force cause circular motion?

it acts at a right angle to the object’s motion and causes the object to constantly change direction.

it acts at a right angle to the object’s motion and causes the object to constantly change speed.

it acts in the direction of the object’s motion and causes the object to constantly change direction.

it acts in the direction of the object’s motion and causes the object to constantly change speed.

What is the scientific definition of energy that relates to work

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.