Force & Motion
This term describes a change in an object’s position over time.
What is motion?
A runner travels 40 meters in 8 seconds. What is the runner’s average speed?
What is 5 m/s?
A car goes from 0 to 20 m/s in 5 seconds. Its acceleration is ____.
What is 4 m/s2?
The amount of gravitational force on an object is called ____.
What is weight?
The law of inertia
What is Newton's 1st law?
Forces that are equal in size and opposite in direction are called ____.
What is a balanced force?
A car moves east for 120 km in 2 hours. What is its velocity?
What is 60 km/h east?
A cyclist increases speed from 4 m/s to 10 m/s over 3 seconds. What is the average acceleration?
What is 2 m/s2?
The acceleration due to gravity on Earth is approximately ____.
What is 9.8 m/s2?
Equation describing Newton's second law of motion
F= ma
Force = mass x acceleration
The total of all forces acting on an object.
What is the net force?
A boat moves upstream at 8 m/s while the river current moves at 3 m/s. What is the boat’s velocity relative to the ground?
What is 5 m/s upstream?
A plane accelerates down a runway at 3 m/s² for 10 seconds. If it starts at 5 m/s, what is its final velocity?
What is 35 m/s down the runway?
Define gravity
The force that pulls objects toward each other.
Define inertia
What is the resistance of an object to any change in its state of motion?
Two students push a box in the same direction. One applies 50 N and the other applies 30 N. What is the net force?
What is 80 N?
A car travels at a constant speed of 22 m/s. How far will it travel in 15 seconds?
What is 330 meters?
(Using d=v×t=22×15d = v \times t = 22 \times 15d=v×t=22×15)
A 3-kg toy car rolls down a ramp and its velocity increases from 2 m/s to 14 m/s.
If it accelerates at 4 m/s², how long does it take to reach 14 m/s?
What is 3 seconds?
As the distance between two objects increases, gravitational force does this.
What is decreases?
For every action, there is an equal and opposite reaction describes this law.
What is Newton's 3rd Law?
A rope pulls a sled east with 60 N, while friction pulls west with 25 N. What is the net force and its direction?
What is 35 N east?
A bicyclist rides with a velocity of 12 m/s east. If they travel 1.8 km, how long does the trip take? (Give your answer in seconds.)
What is 150 seconds?
A train increases speed from 20 m/s to 60 m/s over 0.5 km.
What is the train’s acceleration?
What is 3.2 m/s2?
An astronaut is exploring a distant planet where the gravitational acceleration is 14 m/s². On this planet, the astronaut’s weight is measured at 980 N.
What is the astronaut’s mass?
What is 70 kg?
A 65-kg student is standing on a skateboard. A friend pushes them so that their speed increases from 2 m/s to 8 m/s in 3 seconds.
What net force did the friend apply to the student and skateboard?
What is 130N?