1.True or False: When a ball is twirling at a uniform speed on the end of a string, the inward force is zero.
2.True or False: An object can be accelerating while maintaining a uniform (constant) speed.
3.If you were to reduce the radius of the arc through which you twirled a ball on a string by one-half, the size of the inward force (tension) in the string would be ___ as large
1/4 x
1/2 x
2 x
4 x
4.If you were to increase the mass of the ball by five times, the size of the inward force (tension) in the string would be ___ as large.
1/10 x
1/5 x
5 x
25x
5.The centripetal force acting on a 2.5 kg object whirling at a speed of 3.5 m/s in a horizontal circle of radius 0.80 m is: ___ N. (Give your answer with the correct number of significant digits and do not include units)
1) False
2) True
3) 2 x
4) 5 x
5)
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