Speed
Velocity
Acceleration
KE/PE
100
What is speed?
Speed is the total distance traveled per unit of time. Speed equals distance divided by time.
100
What is velocity?
How fast something is moving in a particular direction. Velocity equals displacement divided by time plus direction.
100
What three things changed acceleration?
Speed Up
Slow Down
Change Direction
100
Kinetic energy increases as...
A. Potential increases
B. Kinetic increases
C. Mass or speed increases
D. Height or mass increases
C. Mass or speed increases
200
A racehorse wins the 3200 meter Cup in a time of 200 seconds. What is the racehorse's average speed?
16 m/s
200
What is the velocity of a rocket that goes 700 kilometers North in 25 seconds?
28 km/s North
200
Is this an example of acceleration? A helicopter turns left while maintaining the same speed?
Yes
200
A bowling ball, baseball, golf ball, and ping pong ball are all rolling down a bowling lane at the same speed. Which one has the most kinetic energy?
Bowling Ball
300
A dolphin keeps up with a boat for a distance of 51 miles for 3 hours. What is the dolphin's average speed?
17 mi/hr
300
A motorcycle travels 300 miles South in 3 hours. What is the average velocity?
100 mi/hr South
300
Is this an example of acceleration? A skateboard coming to a sudden stop when it hits a rock?
Yes
300
A. Potential energy A; Kinetic energy B
400
The speed of sound is roughly 1,484 m/s. How far, in meters, would a sound wave travel in 3 seconds?
4,452 meters
400
How much time does it take a person to walk 8 kilometers East at a velocity of 4 kilometers per hour?
2 hours
400
When a runner increases her speed from 75 m/s to 115 m/s in 25 seconds, her acceleration is?
1.6 m/s^2
400
Suppose you are jumping on a trampoline. At the top of your jump, which of these is true?
A. The mechanical energy is zero
B. The potential energy is at a maximum
C. The kinetic energy and potential energy are equal
D. The potential energy is zero
B. The potential energy is at a maximum
500
A car traveling 65 kilometers per hour travels 195 kilometers. How long did it take the car to travel that distance at that speed?
3 hours
500
If the velocity of a car is 45 kilometers per hour West, how for can it travel in 0.5 hours?
22.5 kilometers
500
What is the acceleration of a toy car that starts from rest and has a speed of 0.12 m/s after 0.1 seconds?
1.2 m/s ^2
500
B. It increases from Step 1 to Step 2, then decreases to Step 3