Changes in Speed/Direction
Mr. Garret is pulling his son Ike in a wagon. As Mr. Garret walks to the left, a force pulls on Ike's wagon. How might this force change the direction of Ike's wagon?
The wagon will move to the left.
Charlie ran a mile in 8 minutes. His sister, Christina, ran the same mile in 10 minutes. Who ran faster?
Charlie ran faster than Christina.
When you throw a ball in the air, what force brings it back towards the ground?
gravity
Which of the following actions can produce heat energy?
* placing a magnet near a metal spoon
* putting a book on the top shelf a bookcase
* rubbing your hands together
* refrigerating leftover food
rubbing your hands together
How might the batter change the motion of the baseball when he hits it?
Both the direction and speed of the baseball will change.
Field day, all the students ran the 100-meter dash. Their finish times are recorded below.
Sandra - 32 seconds
Janice - 47 seconds
Lupita - 42 seconds
Tess - 46 seconds
Who ran the 100-meter dash the slowest?
Janice
Amy is hanging from the monkey bars on the playground. It gets harder and harder for Amy to hold on. What will gravity will cause Amy to do?
fall down
When the tires of a car rub against a road as the car slows down to stop, heat is produced. What causes this?
Friction
When playing tug of war, how can team Y beat team Z?
Team Y must pull harder than team Z
Katie, Matt, Sarah, and Steve were having a bicycle race. Five minutes after they started, everyone stopped because it began to rain. The picture below shows where each bike was located when they stopped:
---------------- Katie
-------- Sarah
------------- Steve
--------------------------Matt
Who was moving the fastest?
Matt
Maurice put a toy truck on top of a ramp and let it go. What will gravity cause the truck to do?
roll down the ramp
What does friction cause a rolling ball to do?
slow down and stop
What is an example of forces causing objects to change speed?
varied answers
Name - Distance - Time
Ron - 50 yds - 8 seconds
Beth - 50 yds - 10 seconds
Joe - 50 yds - 7 seconds
Annie - 50 yds - 9 seconds
Which child ran the fastest?
Joe
Jose and his friend Travis are playing with a parachute toy. Each time one of them throws the toy into the air, its chute opens and it falls to the ground. What best explains why the parachute falls to the ground?
Earth's gravity pulls on all things, so the parachute falls to the ground.
What type of energy does friction release?
heat
What does a force cause an object to do?
Forces cause an object to move or change direction.
How are speed, distance, and time related?
Speed is a measure of distance over time.
How does gravity affect the motion of objects on or near Earth?
Gravity pulls objects toward the center of the Earth.
What would happen if there was no friction?
It would be very difficult to stop