WorksheetsHS Unit 4 Motion & Forces Practice Test
Total questions: 23
Worksheet time: 12mins
A brick mason builds a simple machine to lift bricks from the ground up to the second story of a building. The machine requires an input force of 35 N to lift 75 kg (735 N) of bricks. What is the ideal mechanical advantage (MA) of the simple machine?
MA = 0.048
MA = 2.143
MA = 35
MA = 21
Student A and student B are pushing a box towards the right by applying force as shown. At the same time, student Y and student Z are pushing the box with the force shown, but in the opposite direction. Student A and student B state that the box will move in the direction of the force that they applied, while student Y and student Z state that the box will move in the direction that they applied the force. Which claim is valid?
The net force on the box is 7N and the box will move to the left.
The net force on the box is 4N and the box will move to the right.
The net force on the box is 11N and the box will move in the direction of the greater force.
The net force on the box is 8N and the box will move in the direction of the lesser force.
Two balls of different masses are dropped from a building, and they hit the ground at the same time. How does the force of gravity, exerted on each ball, depend on its mass?
It is independent of the ball's mass.
It is directly proportional to the ball's mass.
It is inversely proportional to the ball's mass.
It is directly proportional to the ball's mass squared.
A boy uses a simple pulley to pull a block up a ramp. The height of the ramp is 4 m and the length of the ramp is 10 m. Assuming that the ramp is frictionless, what is the ideal mechanical advantage of the ramp and does the pulley provide any additional advantage?
The ideal mechanical advantage of the ramp is 0.4, and the pulley makes it easier to pull the block up the ramp.
The mechanical advantage of the ramp is 2.5, and the pulley does not provide any additional mechanical advantage.
The mechanical advantage of the ramp is 10, and the pulley does not provide any additional mechanical advantage.
The mechanical advantage of the ramp is 40, and the pulley does provide an additional mechanical advantage.
Mary and Dianne are ice skating. They push their hands together as shown. Which law supports the claim that Mary and Dianne’s feet will move farther apart?
Newton’s second law – because a force will cause a change in the velocity of an object.
Newton’s third law – because for every action there’s an equal and opposite reaction.
Newton’s first law – because objects at rest tend to stay at rest until an outside force acts upon them.
Newton’s law of universal gravitation – because the attraction between two bodies is inversely related to the distance between them.
What is the difference between speed and velocity?
Velocity includes an object's direction, and speed does not.
Speed includes an object's direction, and velocity does not.
Velocity is always greater than zero, but speed can be greater or less than zero.
Speed is always greater than zero, but velocity can be greater or less than zero.
A soccer ball and a car are dropped from the same height in a vacuum on Earth. Choose the two statements that are correct.
The soccer ball will take less time to reach the ground than the car.
The car will take less time to reach the ground than the soccer ball.
The soccer ball and the car experience the same gravitational force.
The gravitational force each object experiences is dependent on mass.
The soccer ball and the car experience the same acceleration due to gravity.
The table shows the acceleration due to gravity on four different planets. What planet is a person standing on if the person has a mass of 85.0 kg and weighs 305 N?
Mars
Mercury
Venus
Earth
Which pair of graphs represents the same motion of an object?
How is mass different than weight?
Weight is the amount of matter, and mass is the amount of matter plus gravity.
Mass is the amount of matter, and weight is the amount of matter plus gravity.
Mass is the amount of matter, and weight is the amount of matter plus energy.
Weight is the amount of matter, and mass is the amount of matter plus energy.
Jolie is on the weightlifting team at her school. She must lift as much weight as possible from the ground to a straight up standing position. How much work will Jolie do if she uses a force of 5 N to lift 68 kilograms to a height of 1.5 m?
3.3 J
3.5 J
6.5 J
7.5 J
The graph shows an object in motion for 14 seconds. At which time interval on the graph is the object moving at a constant velocity?
0 to 6 seconds
0 to 14 seconds
6 to 8 seconds
8 to 14 seconds
A student drops different objects from the same height on Earth. Based on the data, what is the relationship between an object's mass and the gravitational force that acts upon it?
Objects with more mass have less gravitational force acting upon them.
Objects with more mass have more gravitational force acting upon them.
The gravitational force on an object is one tenth of the mass of an object.
The gravitational force on an object is ten times greater than the mass of an object.
An object is moving along a straight line at a constant speed of 20 m/s. How far did the object travel during the first 4 seconds?
5 m
20 m
40 m
80 m
Of the following scenarios, which would have the greatest gravitational pull?
a sky scraper on Earth's surface
a satellite orbiting Mars
a marble and a baseball 5 meters apart
a person swimming in the ocean
A student used a claw hammer to remove nails from a piece of wood to prepare to paint. What is the effort distance for a claw hammer if the resistance distance is 6.0 cm and the mechanical advantage is 6.0?
1
12
30
36
The law that states that the unbalanced force acting on an object equals the object's mass times its acceleration is __________.
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
The Law of Conservation of Momentum
Read the passage about Newton's laws. An eighth-grade science teacher wants to demonstrate Newton's laws. She moves the lab tables to the side of the classroom and sets up two rolling office chairs at the back of the room. She places a stack of books that weighs 85 pounds on one chair and another stack of books that weighs 130 pounds on the other chair. The teacher then asks a student to give each chair a push with an equal force. Which evidence and explanation BEST describe the relationship between acceleration and mass?
Evidence: The chair with the smaller mass experiences a larger acceleration than the chair with the larger mass. Explanation: The acceleration of an object is inversely related to its mass.
Evidence: The chair with the smaller mass experiences a larger acceleration than the chair with the larger mass. Explanation: The acceleration of an object is directly related to its mass.
Evidence: The chair with the smaller mass experiences a smaller acceleration than the chair with the larger mass. Explanation: The acceleration of an object is inversely related to its mass.
Evidence: The chair with the smaller mass experiences a smaller acceleration than the chair with the larger mass. Explanation: The acceleration of an object is directly related to its mass.
Select the three statements that are examples of work.
A student listens to classical music.
A father pushes a baby in a carriage.
A baseball player throws a ball across a field.
A woman picks up and carries a grocery bag to her car.
A teacher gives a lecture in class.
How far will an object travel if it has a constant velocity of 25 m/s and travels for 6.0 seconds?
4.2 m
15 m
150 m
1,500 m
During a race, a horse's speed increases from 65 m/s to 73 m/s during the last 5.0 seconds of that race. What was the rate of acceleration during this time?
0.16 m/s²
1.6 m/s²
15 m/s²
28 m/s²
What is the total distance traveled by the object from point K to point L?
10 m
15 m
20 m
25 m
Which statement describes the car’s speed as it traveled on the highway?
The car’s speed remained constant.
The car’s speed was increasing at a constant rate.
The car’s speed was decreasing at a constant rate.
The car’s speed increased and then decreased at a constant rate.
