In the speed-time graph for a moving object shown here, the part which indicates uniform deceleration of the object is:

(a) QR

(b) ST

(c) RS

(d) PQ​

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)