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
Throwing a football in the air is an example of this kind of energy
Kinetic energy
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
A combined force that does not cause movement.
a balanced force
A golf ball rolls down a hill on the golf course. Which statement best describes how friction affects the motion of the golf ball?
A. Friction causes the golf ball to roll forwards and backwards.
B. Friction decreases how fast the ball rolls.
C. Friction increases how fast the ball rolls.
D. Friction causes the ball to bounce.
B. Friction decreases how fast the ball rolls.
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.
You want to move two boxes. Which sentence correctly describes the force needed to move the boxes?
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.
Give an example of something with kinetic energy.
Something that is using energy, not storing it!
What force moves an object away from you?
pull
push
gravity
Jedi force
Push
This is the idea that something moving or staying still will continue moving or staying still until another force changes it.
Inertia
Net force.
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.
Give an example of potential energy.
Something that has stored energy!