1. A body moving in a cirele path at constant speed exhibits acceleration becaus

Question

1. A body moving in a cirele path at constant speed exhibits acceleration because its is changing 2. An object undergoes circular motion. Which pair of quantities MUST change? ) the object's speed and acceleration. ) the object's velocity and acceleration. ) the object's mass and speed. C) all of the above. 3. A car races around a circular track at the constant speed of 100 m/s (about 225 mph). The radius of the track is 400 m. The acceleration of the race car is () 25 m/s2, toward the center of the track () 50 m/s2, toward the center of the track () 50 m/s, in the direction of travel () 100 m/s, in the direction of travel Show calculation: 4. What is the magnitude of the force required to produce this centripetal acceleration, if the mass of the car is 1500 kg? ) 25 N Show calculation: () 1500 N 3250 N 37500 N Car A travels with s peed v around curve number one, which has a radius r. Car B travels with speed 2v dius 2r The acceleration will be

Explanation / Answer

1) velocity

2) The object's velocity and acceleration.

3) 25 m/s2, towards the center of the track

a = v2/R = 1002/400 = 25 m/s2

4) 37500N

F = ma = (1500)(25) = 37,500N

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