Name ______Period ____ Due on ______ (Remember, There Is No Late Work for Extra Credit)
Name ______Period ____ Due On ______(remember, there is no “late work” for Extra Credit)
EXTRA EFFORT - Newton’s Laws
0.5 Newton’s First Law is ______.
1.0 Newton’s Second Law is ______.
1.5 Newton’s Third Law is ______.
2.0 True or False Newton’s Second Law says that if you accelerate or decelerate quickly, you use more force and
consequently wear out your car faster.
2.5 The ______is the sum of all forces acting on ONE object.
3.0 An object will move in the direction of the greater lesser unbalanced force.
4.5 A bowing ball has a mass of 6 kilograms. A tennis ball has a mass of 0.06 kilograms. How much inertia does the bowling ball have compared to the tennis ball?
a. They have the same inertia because gravity pulls on everything equally.
b. The bowling ball has 10 times more inertia than the tennis ball.
c. The bowling ball has 100 times more inertia than the tennis ball.
d. The bowling ball has 1000 times more inertia than the tennis ball.
Determine which of Newton’s Laws of Motion is shown by each of the scenarios below. Write a “1,2,or 3” in the blank.
5.0 _____ A frog leaping upward off his lily pad is pulled downward by gravity and lands on another lily pad, instead of continuing on in a straight line.
5.5 _____ As the fuel in a rocket ignites, the force of the gas expansion and explosion pushes out the back of the rocket and propels the rocket forward.
6.0 _____ When you are standing up in a subway train, and the train suddenly stops, your body continues to go forward.
6.5 _____ As an ice skater pushes harder with her leg muscles, she begins to move faster.
7.0 In the space to the right, draw a free body diagram representing this scenario:
A pirate is pushing a 500 N treasure chest. The net force on the chest is 100 N to the right. The pirate pushes with a force of 800 N.
(There should be 4 force arrows)
8.0 A bag of sand has a mass of 10 kg and a weight of 98 N. When it is dropped from the top of a semi-trailer, what is its acceleration toward the ground? (Show your work and begin with an appropriate equation. Remember to label units.)
9.0 Which exerts more force, Earth pulling on the moon or the moon pulling on Earth? Give evidence to support your claim and write your answer in a complete sentence.
10.0 During a test crash, a car is accelerated toward a wall at 2.5 m/s2. An air bag inflates to stop a dummy’s forward motion. If the dummy has a mass of 75 kg, what force does it apply to the air bag when it hits?(Show your work and begin with an appropriate equation. Remember to label units)
11.0 Using the scenario from question 10.0, determine the dummy’s deceleration if the net force on the dummy created by the air bag is 825 N toward the rear of the car. Draw a force diagram and label the strength of each force.
12.0 A block with mass of 5 kg is being pulled across a tabletop by a force of 10 N applied by a string tied to the front end of the block. The table exerts a 2 N frictional force on the block. Draw a free body diagram of this scenario.
(Hint: the downward weight of the block can be determined by multiplying its mass * 9.8 m/s2)
13.0 A block with mass of 5 kg is being pulled across a tabletop by a force of 10 N applied by a string tied to the front end of the block. The table exerts a 2 N frictional force on the block. What is the acceleration of the block? (Show your work and begin with an appropriate equation. Remember to label units.)
14.0 A freight train slows down as it approaches a train yard. If a force of -3.8 x 106 N is required to provide an acceleration of -0.33 m/s2, what is the train’s mass? (Show your work and begin with an appropriate equation. Remember to label units.)
15.0 As I drove through Glacier National Park this summer, several insects smashed on my car window. In the diagram to the right, draw another force arrow and state the reaction to this action in the insect/windshield system.
Which force is larger?