Forces and Motion
A ball is sitting on a desk. Hakeem pushes the ball. What can you predict about the ball’s motion?
A. The ball will move in the direction of the push
B. The ball will stay still
C. The ball will move upward and hit the ceiling
D. The ball will move toward Hakeem
A. The ball will move in the direction of the push
Which of the following is an example of a balanced force?
A. A feather falling
B. A brick sitting on the ground
C. A cup that is falling over
D. A box that is being carried
B. A brick sitting on the ground
Which of the following does NOT describe a magnet?
A. Opposite poles attract
B. Like poles repel
C. Attract certain types of metal
D. Attracted to all metal
D. Attracted to all metal
Two objects are placed near each other. They move away from each other on their own. What type of objects are they?
A. Static Forces
B. Sticks
C. Marbles
D. Magnets
D. Magnets
Greg and James are playing tug-of-war. Greg is pulling on the rope with 6 Newtons of force and James is pulling with 7 Newtons of force. Who is going to win?
A. Greg will win because he is pulling harder.
B. Greg will win because the forces are balanced.
C. James will win because he is pulling harder.
D. James will win because the forces are balanced.
C. James will win because he is pulling harder.
A boy on a swing is moving forward. What can you predict about his future motion?
A. He will move to the left and then forward again
B. He will move backward and then forward again
C. He will move backward and then to the right
D. He will move to the left and then stop
B. He will move backward and then forward again
Which of the following is an example of an unbalanced force?
A. A car moving forward
B. A ball sitting on the ground
C. Two boys that are arm wrestling when nobody is winning
D. A notebook that is sitting on a desk
A. A car moving forward
Robbie dropped a handful of pennies. He wants to pick them up quickly using a magnet. Will this work?
A. Yes, the pennies are metal so they will be attracted to the magnet.
B. Yes, the magnet will stick to the pennies.
C. No, pennies are made of a metal that is not attracted to magnets.
D. No, a magnet is not strong enough to pick up more than one object at a time.
C. No, pennies are made of a metal that is not attracted to magnets.
What is gravity?
A. the force that an object encounters when moving over a surface.
B. the force that pushes an object to move faster
C. the force that pulls an object toward the Earth
D. the force that makes an object keep moving until another force is placed on it
C. the force that pulls an object toward the Earth
If a brick is pushing down on a table with 3 Newtons of force and then brick is not moving, how much force is the table pushing back with?
A. 1 Newton
B. 2 Newtons
C. 3 Newtons
D. 4 Newtons
C. 3 Newtons
How are forces and motion related to each other?
A. Motion causes forces
B. Forces cause motion
C. Forces and motions are opposites
D. Forces always happen after motion
B. Forces cause motion
Which example represents an unbalanced force?
A. Two boys are playing tug-of-war and nobody is moving
B. A boy is swinging and then he stops
C. A girl is pushing on a box and it is sliding across the floor
D. Two girls are pushing on a door and it is not moving
C. A girl is pushing on a box and it is sliding across the floor
Leo is trying to pick up paper clips with a magnet, but the paper clips keep moving away from the magnet. What is the problem?
A. Paper clips are not made of a metal that will be attracted to a magnet
B. Leo needs to turn the magnet around and use the other pole
C. Leo’s magnet is broken
D. Leo needs to move the magnet toward the paper clips faster
B. Leo needs to turn the magnet around and use the other pole
What is friction?
A. the force that an object encounters when moving over a surface.
B. the force that pushes an object to move faster
C. the force that pulls an object toward the Earth
D. the force that makes an object keep moving until another force is placed on it
A. the force that an object encounters when moving over a surface.
Jenni and Sadie are playing tug-of-war. Jenni is pulling on a rope with 5 Newtons of force. How much force does Sadie need to put on the rope so that the force is balanced?
A. 4 Newtons
B. 5 Newtons
C. 6 Newtons
D. 7 Newtons
B. 5 Newtons
Which example represents a balanced force?
A. Two boys are playing tug-of-war and nobody is moving
B. A boy is swinging
C. A girl is pushing on a box and it is sliding across the floor
D. Two girls are pushing on a door and it is slowly opening
A. Two boys are playing tug-of-war and nobody is moving
Sophie kicked a ball during soccer practice. The ball is moving across the grass quickly. Explain the forces that are acting on the ball that Sophie kicked. What will happen to the ball if nobody touches it?
Push, friction, and gravity (pull)
The ball will eventually stop because of the friction of the grass.