A
What is the standard (SI) unit of force?
Newton (N)
On a distance-time graph, what does a horizontal line represent?
The object is at rest (zero velocity)
A car travels 120 meters in 4 seconds. What is its average speed?
30 m/s
What is an object's resistance to change?
What is the acceleration due to gravity on Earth's surface?
9.8 m/s²
What does velocity describe that speed doesn't?
As a vector quantity, velocity describes direction as well as magnitude of speed
An object accelerates from rest to 20 m/s in 5 seconds. What is its acceleration?
4 m/s²
A person has a mass of 60 kg on Earth. What is their weight in Newtons?
588 N
State Newton's First Law of Motion.
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force.
On a velocity-time graph, what does the slope of the line represent?
Acceleration
A velocity-time graph shows a straight line from (0,0) to (5,25). What is the acceleration?
5 m/s2
A 2 kg object experiences a net force of 8 N. Calculate its acceleration using F = ma.
4 m/s²
Acceleration is ...
What is Change in velocity over change in time?
(Vf - Vi) / (t
The Moon's gravity is about 1/6 of Earth's. If you weigh 600 N on Earth, how much do you weigh on the Moon?
100N
What are the forces acting on a ball thrown into the air?
Air Resistance and Gravity
What is the acceleration of a Train slowing from 50 m/s to 10 m/s over 8 seconds?
On a distance-time graph, a curved line that gets steeper represents what type of motion?
Acceleration
A runner maintains a constant velocity of 8 m/s for 12 seconds. How far does the runner travel?
96 m
Two forces of 30 N and 40 N act on an object in opposite directions. What is the net force?
10 N
An object in free fall near Earth's surface falls 44.1 meters. Approximately how long did it fall?
3 Seconds
A 500 kg object is pushed with a force of 350 N. What is the acceleration?
0.7 m/s²
Tyler runs the basketball court 5 times (from one side back to the other 5 times). Ending in his original starting place. What is Tyler's displacement at the end of his run?
0 meters
Explain a ball bouncing off the ground in terms of Newton's Laws
Following Newton's 3rd law, the ball experiences a reactive force when it collides with the ground. This force is in the opposite direction of the ball's causing it to accelerate away from the ground
The area under a velocity-time graph represents what physical quantity?
Displacement (or distance)
An object has initial velocity -5 m/s and acceleration of 3 m/s² for 6 seconds. What is the final velocity?
13 m/s