What do you call a stationary place you choose to base all your motion on?
reference point
100
How fast are you going if in 10 s you cover 100 m?
10 m/s
100
Type of friction on the bottom of a sled you are riding
sliding friction
100
a force that resists motion
friction
100
As distance increases, what happens to gravitational attraction?
It decreases.
200
Name one of the two differences between speed and velocity?
Velocity has a direction or velocity is a displacement from a reference point rather than a total distance traveled.
200
What velocity do you have if you jog 200 meters South in 50 seconds?
4 m/s, S
200
Type of friction wheels typically experience when driving?
rolling friction
200
an attractive force between two objects with mass
gravity
200
As mass increases, what happens to gravitational attraction?
It increases.
300
How can you have an acceleration without a change in speed?
change in direction
300
You accelerate your bike from 2 m/s to 6 m/s in 2 s. What is your acceleration?
2 m/s/s
300
Air resistance is what type of friction?
fluid friction
300
distance covered per unit time
speed
300
If you dropped two similar shaped balls but with different masses from the same height, which will hit first?
Both will hit at the same time.
400
What is the resultant velocity if you are walking 2 m/s towards the back of a bus going 35 m/s, N?
33 m/s N
400
On average, how fast are you going if you bike 60 m in 4 s?
15 m/s
400
Friction a non-moving object is experiencing
static friction
400
displacement per unit time in a set direction
velocity
400
Friction causes what form of energy to form?
heat
500
What is a negative acceleration?
deceleration
500
Deer run across the road. You apply the brakes of your car for 2 seconds to stop the vehicle. You were going 30 m/s. What was your rate of braking?
-15 m/s/s
500
Of the four types of friction, which is the greatest?
static
500
any change in an object's velocity
acceleration
500
A train covers 600 miles traveling West. It was hauling coal to power plant. It took the train 12 hours to reach its destination. What was the train's velocity?