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.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.