WorksheetsModule K Unit #1 Test
Total questions: 20
Worksheet time: 10mins
Why is friction force considered a contact force?
Choose the correct answer.
Friction affects only solid objects.
Friction always acts in the same direction.
Friction is produced when objects slide past one another.
Friction acts in a direction opposite to the direction of an object’s motion.
What is gravity?
a contact force
a frictional force
a magnetic force
a noncontact force
Melanie watched the path a baseball followed after a pitcher threw it. She noticed that the ball traveled horizontally away from the pitcher as well as downward toward the ground. What force caused the ball to accelerate in the downward direction when it was thrown?
applied force
air resistance
electrical force
gravitational force
Which pair of objects has the largest gravitational force?
marble and car
marble and baseball
car and bowling ball
There is no gravitational force between any of these pairs of objects.
Sean is moving heavy furniture by sliding it across the floor. He puts a blanket underneath the furniture. Why did this help him?
The blanket protects the side of the furniture from bumping against the wall.
The blanket reduces the gravitational force between the furniture and the floor.
The friction is larger between the blanket and the floor than between the furniture and the floor.
The friction is smaller between the blanket and the floor than between the furniture and the floor.
Two basketballs are sitting 1 m apart and are not moving. Which best explains why the gravitational force does not cause them to move?
No gravitational force exists between the two objects because they are not touching.
The gravitational force between the two objects is weak because they are 1 m apart.
No gravitational force exists between the two objects because their masses are small.
The gravitational force between the two objects is weak because their masses are small.
Planets A and B are both the same size, but planet B has three times the mass of planet A. How does the weight of an object compare on the two planets?
The weight of an object is the same on both planets.
The weight of an object is three times larger on planet A.
The weight of an object is three times larger on planet B.
The weight of an object will depend on more factors than just the weight and size of the planet.
Jessica is comparing two balls. One ball has a mass of 1 kg, and the other has a mass of 2 kg. She pushes each with a force of 100 N. How do the accelerations of the two balls compare?
The 1 kg ball accelerates the same as the 2 kg ball.
The 1 kg ball accelerates half as much as the 2 kg ball.
The 1 kg ball accelerates twice as much as the 2 kg ball.
The 1 kg ball accelerates four times as much as the 2 kg ball.
When two objects having different masses collide, they move away from each other at different speeds. Which is true of the forces exerted at the moment of impact?
The forces exerted when they collide are equal and opposing.
The forces exerted when they collide are unequal and opposing.
The forces exerted when they collide are equal and in the same direction.
The forces exerted when they collide are unequal and in the same direction.
Look at the diagram of forces acting on an object.
The picture shows a push and a pull acting on a box of books sitting on the floor. What is the net force toward the right on the box?
0 N
50 N
100 N
2,500 N
An airplane is traveling at a speed of 200 m/s relative to the Earth. A person walks toward the front of the plane at a speed of 1 m/s. How fast is that person traveling in reference to the other people on the airplane?
0 m/s
1 m/s
200 m/s
201 m/s
The diagram shows the forces acting on a running shoe.
As force F is applied, the shoe does not move. Which statement describes the forces?
The net force is acting to the left.
The net force is moving to the right.
The net force is acting in an upward direction.
The net force is zero, and all the forces are balanced.
A fisherman steps off a boat, which is in the water, onto a dock. What happens?
The boat and dock do not move.
The boat moves toward the dock.
The boat moves away from the dock.
The dock moves away from the boat.
Two equal forces act in opposite directions on object A. Two unequal forces act in opposite directions on object B. If these are the only forces acting on objects A and B, which of these conclusions is true?
Only object A will accelerate.
Only object B will accelerate.
Both object A and object B will accelerate.
Neither object A nor object B will accelerate.
A soccer player kicks a ball. The player’s foot exerts a force on the ball. The ball exerts a force on the foot. Why don’t the forces cancel out to result in a net force of zero?
The ball moves before the forces can cancel out.
The forces become unbalanced due to air resistance.
The force on the ball is greater than the force on the foot.
The forces are exerted on different objects, and neither force is zero.
A car is moving at a constant speed on a straight road. What can be said about the net force acting on the car?
The net force is acting vertically downward.
The net force is opposite to the direction of the car's motion.
The net force is in the direction of the car's motion.
The net force is zero because the car is moving at a constant speed.
Two ice skaters push off from each other on a frictionless ice surface. What happens to their speeds?
Both skaters move at the same speed in opposite directions.
The skater with more mass moves faster.
The skater with less mass moves faster.
Both skaters remain stationary.
A book is resting on a table. Which force is responsible for the book not falling through the table?
Frictional force
Normal force
Magnetic force
Gravitational force
What happens to the gravitational force between two objects if the distance between them is doubled?
The gravitational force remains the same.
The gravitational force is quartered.
The gravitational force is halved.
The gravitational force doubles.
A car accelerates from rest at a constant rate. What can be said about the net force acting on the car?
The net force increases over time.
The net force is zero.
The net force is constant and non-zero.
The net force decreases over time.
