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WorksheetsUnit 2: Newton's Laws Check Point Quiz
Total questions: 40
Worksheet time: 8hrs 35mins
An object has no net force acting on it. Which statement below best describes its motion?
It must be at rest.
It is either at rest or is moving with a constant velocity.
It is moving with a constant speed.
It is accelerating.
If a cannonball were launched into deep space (no friction or gravitational effects), how much force would be needed to keep the ball moving with a constant velocity?
A force equal to its weight.
No force would be needed.
A force large enough to balance friction.
150-N
What does Newton’s First Law say about an object moving with a constant speed and direction?
It has no net force acting on it.
It has no forces acting on it.
It must have a net force acting on it.
Nothing, because Newton’s First Law only applies to objects at rest.
When your incredibly talented Physics teacher pulled a tablecloth out from under the dishes, why didn’t the dishes fly off the table?
Because the force that was applied horizontally on the tablecloth cancelled out the force on the dishes.
Because gravity held them on the table.
The horizontal force was only applied to the tablecloth, not to the dishes.
The dishes were heavier than the tablecloth.
In a classic pool hustle, a quarter in placed on the top of a pool ball. The pool ball is struck by the cue ball and the quarter drops straight down. Why does this happen?
Because there was a horizontal force applied to the pool ball that cancelled out the horizontal force on the quarter.
Because there was a horizontal force applied to the pool ball but not on the quarter. So the quarter fell because of gravity.
Because there was a horizontal force applied to the quarter that cancelled out the horizontal force on the pool ball.
The pool ball was heavier than the quarter.
You are riding in a car without wearing a seat belt and the car hits a tree and stops. Which of the reasons below best explains why you fly forward and hit the dashboard of the car?
There is no longer any force on the car. Since you were not wearing your seat belt the force is still on you pushing you forward until the dashboard cancelled it out.
Because the force was only applied to the car. Since you were not wearing your seat belt you continued moving forward until the dashboard stopped you.
The force was applied to the tree and to you since you were in the car. This force on you would actually cause you to fly out the back window of the car.
Since the car was stopped you were also stopped and would not have hit the dashboard.
Which of the following graphs of acceleration vs. mass represents Newton's Second Law of Motion if the force on the object is constant?
A 20 kg box is being pushed across a floor with an acceleration of 2 m/s2. What is the net force on the box?
40-N
10-N
22-N
18-N
What is the acceleration of a 50 kg box being pushed with a net force of 4 N?
0.08 m/s2
12.5 m/s2
54 m/s2
200 m/s2
Which of the following graphs of acceleration vs. force represents Newton’s Second Law of Motion if the mass stays constant?
If you push a box with an increasing force, what will happen to the acceleration of the box? You can assume the mass of the box remains constant.
The acceleration will decrease.
The acceleration will remain constant.
The acceleration will increase.
The acceleration will increase at first and then decrease.
A rocket’s engines propel it upward with 12,000 N of force. If the mass of the rocket is 120 kg, find its acceleration. Assume you are near the Earth's surface.
90 m/s2
100 m/s2
9.8 m/s2
10,800 m/s2
An object weighs 30 N on Earth. Another object weighs 30 N on the Moon. Which object has more mass?
The one on Earth
The one on the Moon.
They both have the same mass.
This cannot be determined since the mass changes with location.
Which of the objects listed below have the greatest inertia?
A 500 kg object that is not moving.
A 300 kg object that is not moving on the Moon.
A 250 kg object moving at 25 m/s.
A 700 kg object moving at 3 m/s.
What is the mass of a 3000 N rock?
30.6-kg
306-kg
3060-kg
3.06-kg
A 75-kg wagon is being pulled in the horizontal direction by a 225-N force. There is a frictional force acting on the wagon of 38-N. What is the mass of the wagon?
75-kg
225-N
38-N
7.7-kg
A 3200-kg rocket is fired vertically with 50,000-N of force. What is the weight of the rocket?
3200-N
50,000-N
327-N
31,360-N
The diagram shows the mass and velocity of four carts.
Which cart has the greatest inertia?
The 3-kg cart
The 2-kg cart
The 8-kg cart
The 5-kg cart
What is a net force? Choose all correct choices.
One force than can replace all other forces acting on an object or system.
The vector sum of all the forces acting on an object or system.
The vector sum of just two of the forces acting on an object.
The sum of the magnitudes of all the forces acting on an action.
Two forces are acting on an airplane as shown.
What is the net force acting on the plane?
8,000 N to the right.
8,000 N to the left.
13,000 N to the right.
13,000 N to the left.
Two forces are acting on an airplane as shown.
If the plane has a mass of 10,000-kg, what is the acceleration of the airplane?
1.3-m/s2
0.8-m/s2
1.05-m/s2
0.19-m/s2
Two forces are acting on an airplane as shown.
What is the net force acting on the plane?
8,000 N to the right.
8,000 N to the left.
13,000 N to the right.
13,000 N to the left.
Two forces are acting on an airplane as shown.
If the acceleration of the airplane is 0.32-m/s2, what is the mass of the airplane?
2.5 X 10-5-kg
40,625-kg
4 X 10-5-kg
25,000-kg
A 20-N falling object encounters 4-N of air resistance. The magnitude of the net force on the object is
0-N
4-N
16-N
20-N
A 75-kg wagon is being pulled in the horizontal direction by a 225-N force. There is a frictional force acting on the wagon of 38-N. What is the net force on this wagon?
187-N
112-N
225-N
38-N
What does it mean for an object to be in equilibrium? Select ALL correct answers.
It has no net force acting on it.
The forces acting on the object all cancel out.
The forces acting on an object balance out.
The sum of all the forces acting on an object is 0.
The object is ONLY at rest.
The free body diagram of four boxes are shown below. Choose ALL boxes that are accelerating. Choose ALL correct answers.
What is the difference between mass and weight? Choose ALL correct answers!!!
Mass is measured in kilograms and weight is measured in Newtons.
Mass is a scalar while weight is a vector.
Weight is affected by gravity but mass isn't.
There is no difference because mass & weight are the same thing.
What is the WEIGHT of a 70-kg person on Mars? (g = 3.8-m/s/s)
266-N
18.4-N
686-N
70-N
A 25-kg turkey is standing on a 10-kg platform suspended by two ropes. If the tension in each rope is the same, find the tension in one of the ropes.
35-N
343-N
17.5-N
171.5-N
A 25-kg turkey is standing on a 10-kg platform suspended by two ropes. If the tension in one rope is 200-N, find the tension in the other rope.
165-N
143-N
235-N
443-N
A 75-kg wagon is being pulled in the horizontal direction by a 225-N force. There is a frictional force acting on the wagon of 38-N. What is the acceleration of the wagon?
2.49-m/s/s
3.00-m/s/s
0.51-m/s/s
3.51-m/s/s
For the distance vs. Time graph as shown, identify which intervals have no net force acting on the object. Choose ALL correct answers!!!
A
B
D
E
G
The net force of a box sliding across a table is 28-N. The box has an acceleration of 4.2-m/s2. What is the mass of the box?
2.9-kg
6.7-kg
0.15-kg
5-kg
For the velocity vs. time graph shown, identify the interval that shows the object has a net force acting on it. Choose ALL correct answers!!!
A
B
C
D
E
A box is sliding DOWN the ramp as shown. Which diagram below is a correct Free-Body Diagram of the box? {NOTE: Fg is the force of gravity, FN is the normal force, and f is the friction.}
A mother and her child are near each other on the ice as shown. The mother pushes her child away from her.
If the action is the mother pushing her child, what is the reaction according to Newton's Third Law?
The child pushing her mother.
The weight of her child.
The child pushing down onto the ice.
The mother pulling her child.
A mother and her child are near each other on the ice as shown. The mother pushes her child away from her.
Assuming the mother has more mass than her child, how do the size of the mother's push on her child to the child's push on her mother?
They are the same size.
The mother's push is greater in size than the child's push.
The child's push is greater in size than the mother's push.
The mother's push starts out greater in size than the child's push, but eventually the child's push becomes greater in size.
A mother and her child are near each other on the ice as shown. The mother pushes her child away from her.
The mother's mass is 135-kg and her acceleration is 0.35-m/s/s. If the child has a mass of 65-kg, what is the child's acceleration?
0.73-m/s/s
0.17-m/s/s
0.35-m/s/s
9.8-m/s/s
