Collisions
What is a collision?
A collision is when two objects hit each other
Name the indicator of energy:
A croquet ball rolling after being hit
Motion, sound
How did we change the amount of energy the car had during our investigations?
We changed the height of the ramp.
Marcus released two identical toy cars from different heights on a ramp. He released the first car from a higher point so it was moving faster when it reached the bottom. He released the second car from a lower point so it was moving slower when it reached the bottom. The first car rolled farther after reaching the bottom.
Which toy car had more energy of motion?
The first car because it was from a higher ramp and was moving faster.
Ethan used a drumstick to hit three drums. He tapped the first drum gently, hit the second drum harder, and struck the third drum the hardest.
Which hit likely made the quietest sound?
The first drum because he hit it gently.
What happens when a slow moving car hits a stationary car?
The stationary car moves a little
Name the indicator of energy:
A spacecraft heating up as it moves through the air
Heat, motion
How did speed affect the sound during collisions?
The faster speed made more sound
Noah rang a bell two times. He shook the bell slowly the first time and faster the second time. The first ring was quiet, and the second ring was louder.
When did the bell have less energy of motion?
The first ring because it was quiet.
Liam, Sofia, and Mateo were rubbing their hands together to warm them up on a cold day. After a short time, Mateo’s hands felt the warmest. Sofia’s hands felt warm, but not as warm as Mateo’s. Liam’s hands felt the coolest.
Who was likely rubbing their hands together the slowest?
Liam because his hands felt the coolest.
What happens when a fast moving car hits a stationary car?
The stationary car moves a lot.
Name the indicator of energy:
a loud thud when two objects hit
sound, motion
Does a faster object have more or less energy?
More
The boys ran in place at a slow speed for one minute and then ran in place at a fast speed for one minute. When did they have more energy?
They had more energy when they ran in place at a fast speed.
Jordan rolled three identical balls down ramps of different heights. Each ball reached the bottom of its ramp.
The first ball rolled down the tallest ramp and moved the fastest.
The second ball rolled down a medium-height ramp and moved slower.
The third ball rolled down the shortest ramp and moved the slowest.
Which ball likely had the most energy when it reached the bottom of the ramp?
The first ball because it had the tallest ramp and moved the fastest.
When a moving object hits a stationary object and the stationary object starts moving, what happened to the energy?
The energy was transferred from the moving car to the stationary car.
Name the indicator of energy:
a car rolling down a ramp
motion
Give an example of how you know something has a lot of energy.
It moves fast, it has a loud sound, it is hot.
Maya was rolling a marble into a row of identical marbles lined up on a table. When the moving marble hit the row, energy transferred through the marbles and caused the marble at the other end to roll away.
Maya rolled the marble three times: slowly the first time, faster the second time, and fastest the third time.
Which roll would cause the marble at the other end to move the shortest distance?
The first time-the slowest.
Carlos, Mia, and Hannah were bowling. Each player rolled a bowling ball down the lane.
Hannah’s ball rolled the farthest before stopping.
Mia’s ball rolled a shorter distance.
Carlos’s ball rolled the shortest distance.
Who likely rolled the bowling ball the fastest?
Hannah because her ball rolled the farthest.
Why did the stationary car move further in the second video?
The moving car in the second video was moving faster, therefore it had more energy.
Name the four indicators of energy
Motion, sound, heat, light
What happens to the amount of energy when an object moves faster?
The faster an object moves, the more energy it has.
Lena, Marcus, and Noah were playing at the playground. Lena pushed a swing gently. Marcus pushed a swing harder. Noah pushed a swing the hardest.
Which swing likely moved the farthest after being pushed?
Noah because he pushed the swing the hardest.
While cleaning up the classroom, two students accidentally pushed plastic cups across the floor. Carl pushed a cup quickly, and it slid a long distance. Riley pushed a cup slowly, and it slid only a short distance.
Which push had less energy of motion?
The cup that Riley pushed because it was pushed slower and didn't move as far.