Force and Motion 1
What is the definition of a force?
A push or pull
The force that pulls a ball back to earth
Gravity
True or False: Gravity is a force that pulls objects down to Earth.
True
Which situation best describes overcoming the force of gravity?
A. Sitting in a chair.
B. Jumping up and down.
C. Eating lunch.
B. Jumping up and down.
The measure of how much matter is in an object
What is mass
Which word means a change in position?
Speed, Motion, Direction, or Force
Motion
What is the type of force called that keeps objects in place or slows them down?
Friction
The force that acts directly against the direction of motion.
Friction
Pushes and pulls are examples of...
forces
stretches
twists
kicks
Forces
True or False: A change in the mass of an object can change the motion of the object.
True
Is kicking a soccer ball a push or a pull?
push
pull
push
When an object changes its path of motion, it changes _____________.
Direction
In which direction will an object move?
A. In the direction of the SMALLEST force
B. Whatever way the wind blows it
C. In the direction of the LARGEST force
D. Objects don't move.
C. In the direction of the LARGEST force
You sit on the swing at recess and a friend starts to push you. Is this an example of a balanced or unbalanced force? Why?
You made a ramp to roll a ball down. You test four different heights. Which height would cause the ball to roll the fastest?
a) 10 cm b) 20 cm c) 30 cm d) 40 cm
40 cm
You want to move two boxes (one light and one heavy). Which sentence is correct?
More force is needed to move the lighter box.
More force is needed to move the heavy box.
More force is needed to move the heavy box.
Which object would require the most force to move?
a tennis ball
a baby
a car
a cell phone
A car
A soccer ball is at rest on the ground. When a force is applied to it, it moves. If larger force is applied to it, how will the motion of the soccer ball change?
A. The ball will move less distance with less speed.
B. The ball will move farther with less speed.
C. The ball will move farther with more speed.
D. The ball will move less with more speed.
C. The ball will move farther with more speed.
There is a car parked on the side of the road. Is this an example of a balanced or unbalanced force? Why?
A parked car would be a balanced force because its motion is not changing.
In a game of tug-of-war, if both sides are holding the rope and no one is moving yet, what kind of force is this?
Balanced force
What force moves an object away from you?
pull
push
gravity
Jedi force
Push
A measurement of how fast an object moves is called what?
Speed
How an object moves (speed, direction) is called what?
Children are applying force to roll a ball down a ramp and measuring how fast the ball rolls. If the children want the ball to roll faster down the ramp, what should they do?
A. increase the force applied to the ball.
B. decrease the height of the ramp
C. decrease the angle of the ramp
D. increase the friction between the ball and the ramp
A. increase the force applied to the ball.
If a ball is moving and suddenly speeds up and turns to change direction, what kind of force is it?
Unbalanced force