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Worksheets11.M1.Q2.Review
Total questions: 15
Worksheet time: 49mins
*Application of Newton's Laws*
Two monkeys of equal mass are holding onto a single
vine of negligible mass that hangs vertically from a
tree, with one monkey a few meters higher than the
other. What is the ratio of the tension in the vine above
the upper monkey to the tension in the vine between
the two monkeys?
1
1/2
1.5
2
More information is required
*Application of Newton's Laws*
An object of unknown mass experience the following forces: F1 = 40 N east; F2 = 50 N north; F3 = 70 N west; and F4 = 90 N south.
What is the magnitude of the net force on the object?
50 N
70 N
131 N
170 N
250 N
*Applications of Newton's Laws*
Which of the following statements is true?
An astronaut’s weight is the same on the Moon as on Earth
An astronaut’s mass is the same on the International Space Station as it is on Earth.
Earth’s gravity has no effect on astronauts inside the International Space Station.
An astronaut’s mass is greater on Earth than on the Moon.
None of these statements are true.
"Applications of Newton's Laws*
A 150-N bird feeder is supported by three cables as shown in Figure P4.19. What is the tension in the upper left cable?
150 N
75 N
130 N
100 N
* Work & Energy*
A worker pushes a wheelbarrow 5.0 m along a level surface, exerting a constant horizontal force of 50.0 N. If a frictional force of 43 N acts on the wheelbarrow in a direction opposite to that of the worker, what net work is done on the wheelbarrow?
250 J
215 J
35 J
15 J
45 J
*Work & Energy *
A 40.0-N crate starting at rest slides down a rough 6.00-m-long ramp, inclined at 30.0° with the horizontal. The magnitude of the force of friction between
the crate and the ramp is 6.0 N. What is the speed of
the crate at the bottom of the incline?
1.6 m/s
3.32 m/s
4.5 m/s
6.42 m/s
7.75 m/s
*Work & Energy*
A 70-kg base runner begins his slide into second base when he is moving at a speed of 4.0 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. How much mechanical energy is lost due to friction acting on the runner?
560 J
-560 J
56 J
-56 J
5600 J
*Momentum & Collisions*
A soccer player runs up behind a 0.450-kg soccer ball traveling at 3.20 m/s and kicks it in the same direction
as it is moving, increasing its speed to 12.8 m/s. What
magnitude impulse did the soccer player deliver to the
ball?
2.75 kg.m/s
4.32 kg.m/s
5.61 kg.m/s
7.08 kg.m/s
9.79 kg.m/s
* Momentum & Collisions*
If two particles have equal kinetic energies, are their momenta equal?
yes, always
no, never
yes, as long as their masses are equal
yes, as long as both mass and direction are the same
no, unless they are traveling perpendicularly
*Newton, Kepler and Gravity*
The gravitational force exerted on an astronaut on Earth’s surface is 650 N down. When she is in the International Space Station, is the gravitational force on her is
larger
smaller
exactly the same
zero
nearly, but not exactly zero
*Newton, Kepler and Gravity*
What is the gravitational acceleration close to the surface of a planet with twice the mass and twice the radius of Earth?
1 g
0.5 g
0.25 g
2 g
4 g
* Rotational Motion and Gravitation*
A merry-go-round rotates with constant angular speed. As a rider moves from the rim of the merry-go-round toward the center, what happens to the magnitude of total centripetal force that must be exerted on him?
It increases
It decreases
It remain the same
It is zero
*Momentum & Collisions*
Two bodies A & B, have equal kinetic energies. The mass of A is 9 times that of B. What is the ratio of the momentum of A to that of B?
1:9
1: 3
1:1
3:1
9:1
*Momentum & Collisions*
Momentum can be expressed as:
kg/m
N.s
kg.m/s
N/s
kg/m/s
*Momentum & Collisions*
A 2.5 kg stone is released from rest and falls towards Earth. After 4.0 s the magnitude of the momentum is:
98 kg.m/s
78 kg.m/s
39 kg.m/s
24 kg.m/s
0 kg.m/s
