Assuming that the box is moving to the right, what is the magnitude and direction of the force applied by the person pushing?
2 N, right
2 N, left
0.4 N, right
0.4 N, left
10 N, left
A car slides up a frictionless inclined plane. How does the normal force of the incline on the car compare with the weight of the car?
The normal force must be equal to the car's weight.
The normal force must be less than the car's weight.
The normal force must be greater than the car's weight.
The normal force must be zero.
The normal force could have any value relative to the car's weight.
What is the magnitude of the acceleration of the 40 kg block?
0.5 m/s•s
1 m/s•s
2 m/s•s
4 m/s•s
5 m/s•s
What is the magnitude of the tension T in the rope that connects the two blocks?
0 N
10 N
20 N
40 N
50 N
Two people are pulling on the ends of a rope. Each person pulls with a force of 100 N. The tension in the rope is:
100 N
141 N
200 N
What must be necessary for the driver to feel weightless?
at the top of a hill when v > √gr
at the bottom of a hill when v > √gr
going down a hill when v = √gr
at the top of a hill when v < √gr
at the bottom of a hill when v < √gr
In which position would the tension in the string be largest?
The tension in mass A
The tension in mass B
The tension in mass C
The tension in mass D
All strings have the same tension
What is the magnitude of the acceleration of the "two block" system?
3 m/s•s
6 m/s•s
15 m/s•s
What is the magnitude of the force of static friction between the top and bottom blocks?
25 N
30 N
What is the minimum coefficient of static friction necessary to keep the top block from slipping on the bottom block?
0.05
0.10
0.20
0.30
0.40
A satellite orbiting the Earth with a radius of R has an acceleration due to gravity of Ag. If the radius is doubled, what is the acceleration of the satellite?
Ag
Ag/4
Ag/2
Ag/3
Ag/16
What is the tension in the horizontal cable?
87 N
150 N
170 N
260 N
300 N
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