Familiar Forces
Motion
Mass and Force
Balanced and Unbalanced
Random
100
True or false: Gravity always acts toward the center of the Earth?
True
100
What always changes when an object is in motion?
Position
100
Out of a bowling ball, soccer ball, baseball, and volleyball, the bowling requires the most force to move. What is the explanation?
The bowling ball has more mass.
100
What kind of force is being applied to the box if the box is not moving?
A balanced forced.
100
What is the difference between a balanced and unbalanced force?
Unbalanced forces cause motion, balanced forces do not.
200
Which has most friction and why?
wet ice
thick carpet
waxed wood
Thick carpet because it is more rough.
200
What do you need to know to find the speed of an object?
Distance and time
200
Why does a truck carrying a heavy load move uphill slower than an empty truck even though the engine exerts the same force?
The force exerted by the engine has a smaller effect on the truck with greater mass.
200
Danielle pushed gently on an object, but the object did not move. Why didn't the object move even though force was applied?
The force that she applied was balanced by another force.
200
If you held the object in the picture near paperclips containing iron, what would be the result?
The paper clips would be attracted.
300
Which forces can affect an object's motion without touching the object?
Gravity and magnetic force
300
How would you describe how forces such as a kick affect a soccer ball?
Forces cause it to change speed and direction.
300
Stefan pushes a cart with three books so reaches the end of the track. Next, he puts six books onto the cart. How much force does Stefan use to make sure the cart with six books makes it to the end of the track?
Use more force.
300
Arrows represent the forces applied to an object. A longer arrow means greater force. Draw an object with two forces acting on it that move upward.
300
The same amount of force was used on each object. Which object traveled the farthest?
Metal washer
400
Raoul threw a ball into the air and watched it go up. Then it started to fall back toward him. What force caused the ball to start to move downward?
gravity
400
How does the motion of Object 1 compare to the motion of Object 2 in speed and direction?
The objects move in the same direction. Object 1 moves half as fast as Object 2.
400
What is likely to be the measurement missing from the table?
Any number <30 and >92.
400
Draw an arrow to show which direction the box will move.
400
How are variables of the experiment being controlled?
The mass changes for each trial but the force does not change.
500
Alonso uses a stretch rubber band to propel a toy car across a flat surface. What force makes the car roll forward?
A push from the rubber band.
500
By applying force on an object, you can change these three things.
direction, speed and velocity
500
Which will move the farthest (travel the greatest distance)?
A 50 grams.
500
Eli pushes a box with 1N of force, and Judy pushes with 2N in the opposite direction. Which direction did the box move?
It moved toward Eli.
500
Gravity is a force that pulls objects toward Earth's center. Which claim tells how the gravitational force on a 1-kg block of wood compares to the gravitational force on a 5-kg block of steel, if both are on the ground?
The force exerted on the steel block is greater than the force exerted on the wooden block.