Examples: pushing a desk but it does not move, standing still, a book laying on a desk, etc.
100
What is the formula for force according to Newton's second law?
force=mass x acceleration
100
What does friction try to prevent?
Movement
100
What is the formula average speed.
average speed = distance/time
100
According to inertia, if no forces act on a moving object...
it will keep moving.
200
If the forces acting on an object are balanced, the object is
at rest or in constant motion.
200
Draw a picture on the whiteboard that illustrates inertia.
answers vary
200
What is rolling friction?
The friction that allows a wheel to roll.
200
An object travels at a constant speed of 60 miles per hour for 4 hours. How far does it travel?
240 miles
200
Which object has the greatest inertia?
10g, 48g, 1g, or 8g
48g
300
Which of the following changes when an unbalanced force acts on an object? motion, mass, inertia, weight
motion
300
An object at rest stays at ________, and object at motion stays in __________ UNLESS acted on by an ________________ force.
rest, motion, unbalanced
300
What is sliding friction?
Sliding friction is what slows an object that is sliding.
300
A car travels 350 miles in 5 hours. What is the average speed?
70 miles per hour
300
Two teams are playing tug-of-war. Team A is pulling with a force of 650N, team B is pulling with a force of 500N. What is the resulting direction?
toward Team A
400
What does Newton's 3rd Law State?
Every action has an equal and opposite REACTION.
400
What is static friction?
Static friction prevents an object from moving
400
An object travels 125 meters in 25 seconds. What is the average speed?
5 meters per second
400
Two teams are playing tug-of-war. Team A is pulling with a force of 650N, team B is pulling with a force of 500N. What is the resulting magnitude?
150N
500
When the forces acting on an object are balanced, the net force is...
Zero
500
How much force is needed to move a 120 pound person with an acceleration of 1.2 m/s2?
144 Newtons
500
Name the 3 types of friction and give an example of each.
Static- pushing and box and it doesn't move
Sliding- You are sledding down a hill and you slow down at the bottom
Rolling- your bike tires allow you to move
500
Draw a time distance graph on the whiteboard and include a slow portion, fast portion, and no movement portion.
answers may vary
500
An object traveling 14N North collides with an object traveling 27N South. What is the resulting direction and magnitude?