1. A train engine pulls the boxcars. What are the horizontal forces present?(1 point)

A.push of engine, friction

B.weight, friction

C.pull of engine, friction

D.pull of engine, weight

2. A train pulls the boxcars. What are the vertical forces present?(1 point)

A. weight, push of tracks against wheels

B.weight, pull of air on boxcars

C.pull of air on boxcars, push of tracks against wheels

D. weight, friction

3. The force of gravity on the Moon is 1.6 m/s2 and on Mars it is 3.7 m/s2. How does the weight of an astronaut on the Moon compare to that of an astronaut on Earth or Mars?(1 point)

A.The astronaut weighs the most on the Moon and the least on Mars.

B.The astronaut weighs the most on Earth and the least on Mars.

C.The astronaut weighs the most on Mars and the least on the Earth.

D.The astronaut weighs the most on Earth and the least on the Moon.

4. In the free-body diagram, the net force is 800 N. What is the magnitude of the downward force?
A.800 N

B.200 N

C.600 N

D.1,000 N

5. In the free-body diagram, what is the net force?

A.10 N, right

B.32 N, right

C.80 N

D.40 N, right
6. A group of students conduct an experiment to study Newton’s second law of motion. They applied a force to a toy car and measure its acceleration. The table shows the results.

If the students graph the data points, which conclusion will they be able to make?

A.The data points will fall along a line. This shows that as the force increases, the acceleration increases.

B.The data points will not fall along a line. This shows that as the force increases, the acceleration decreases.

C.The data points will not fall along a line. This shows that as the force increases, the acceleration increases.

D.The data points will fall along a line. This shows that as the force increases, the acceleration decreases.

Question

05-10-2021
Physics

Answered

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1. A train engine pulls the boxcars. What are the horizontal forces present?(1 point)

A.push of engine, friction

B.weight, friction

C.pull of engine, friction

D.pull of engine, weight

2. A train pulls the boxcars. What are the vertical forces present?(1 point)

A. weight, push of tracks against wheels

B.weight, pull of air on boxcars

C.pull of air on boxcars, push of tracks against wheels

D. weight, friction

3. The force of gravity on the Moon is 1.6 m/s2 and on Mars it is 3.7 m/s2. How does the weight of an astronaut on the Moon compare to that of an astronaut on Earth or Mars?(1 point)

A.The astronaut weighs the most on the Moon and the least on Mars.

B.The astronaut weighs the most on Earth and the least on Mars.

C.The astronaut weighs the most on Mars and the least on the Earth.

D.The astronaut weighs the most on Earth and the least on the Moon.

4. In the free-body diagram, the net force is 800 N. What is the magnitude of the downward force?
A.800 N

B.200 N

C.600 N

D.1,000 N

5. In the free-body diagram, what is the net force?

A.10 N, right

B.32 N, right

C.80 N

D.40 N, right
6. A group of students conduct an experiment to study Newton’s second law of motion. They applied a force to a toy car and measure its acceleration. The table shows the results.

If the students graph the data points, which conclusion will they be able to make?

A.The data points will fall along a line. This shows that as the force increases, the acceleration increases.

B.The data points will not fall along a line. This shows that as the force increases, the acceleration decreases.

C.The data points will not fall along a line. This shows that as the force increases, the acceleration increases.

D.The data points will fall along a line. This shows that as the force increases, the acceleration decreases.

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oeerivona oeerivona · Answer 1 · 2021-10-11T09:44:55-04:00

Force is the influence that is capable of bringing about motion

The correct options are;

1. C. The pull of the engine, friction force

2. A. Weight, push of the tracks against the wheel

3. D. The astronaut weighs the most on Earth and least on the Moon

4. Please see attached drawing for example

5. Please see attached drawing for example

6. The data points will fall along a line this that as the force increases, the acceleration increases

Reason:

1. The horizontal forces are the forces acting along the horizontal x-axis, therefore;

A train engine pulling a boxcar what horizontal forces are;

C. The pull of the engine, friction force

2. The vertical forces are the forces acting an the direction of the y-axis of a graph

The vertical forces present when a train pulls a boxcar are;

A. Weight, push of the tracks against the wheel

3. The weight of an astronaut, W = mass × Gravity

Therefore, the weight increases with increasing acceleration due to gravity

Therefore, the least weight is on the moon, where acceleration due to gravity is 1.6 m/s², and most on Earth where the acceleration due to gravity is approximately 9.81 m/s²

The correct option is D. The astronaut weighs the most on Earth and least on the Moon

4. The magnitude of the downward force is the sum of the vertical forces acting downwards

5. The net force is given by the vector sum of the forces

6. According to Newton's second law, Force, F = Mass, m × Acceleration, a

Therefore, where the students conduct the experiments rightly, we have that the data points will fall along a line this that as the force increases, the acceleration increases

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