Objective questions based on force and acceleration

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Reference no: EM1313318

Q1. John throws a baseball from the outfield from shoulder height, at an initial velocity of 29.4 m/s at an initial angle of 30.0 with respect to the horizontal. The ball is in its trajectory for a total interval of 3.00 s before the third baseman catches it at an equal shoulder-height level. (Assume air resistance negligible) What is the ball's horizontal displacement?

76.4 m
57.3 m
66.7 m
38.2 m
Zero

Q2. A 7.0-kg bowling ball experiences a net force of 5.0 N. What will be its acceleration?

35 m/s2
0.71 m/s2
0.71 m/s2
7.0 m/s2
5.0 m/s2
0.52 m/s2

Q3. As I slide a box at constant speed up a frictionless slope, pulling parallel to the slope, the tension in the rope will be:

Greater than the tension would be if the box were stationary.
Greater than the weight of the box.
Equal to the weight of the box.
Less than the weight of the box.
Less than the tension would be if the box were stationary.

Q4. A 500-N tightrope walker st&s at the center of the rope such that each half of the rope makes an angle of 10.0 with the horizontal. What is the tension in the rope?2 900 N

2 100 N
1 440 N
1 000 N
500 N

Q5. A horizontal force of 750 N is needed to overcome the force of static friction between a level floor & a 250-kg crate. If g = 9.8 m/s2, what is the coefficient of static friction?

3.0
0.31
2.5
0.15
0.28

Reference no: EM1313318

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