Speed
A train travels 1200 miles in two hours during a trip. What was the average speed of the train during the trip?
600 mph
Which of Newton's Laws says that an object at rest will stay at rest, but an object in motion will stay in motion?
1st Law, Law of Inertia
What is the formula for force?
Force = Mass x Acceleration
What is one way to make something accelerate faster?
1) Less mass
2) More force
What is speed?
Distance traveled divided by time
Sorena wishes to measure the speed of a toy truck at the bottom of a ramp. Which information does she need to calculate the speed?
The length of the ramp and the time for the toy truck to go down the ramp.
According to Newton's Law of action and reaction, what will happen to a ball after it is kicked?
It will move in the direction it was kicked until a force stops it.
What do the F, M, and A stand for in F = M x A?
Force, mass, and acceleration
Give an example of Newton's Laws that you saw in the movie yesterday.
Answers may vary
A car traveled 420 miles in seven hours. How far did the car travel in three hours?
180 miles
Marcus wants to know how fast he runs different races. He uses a stopwatch to measure the time it takes him to complete the 100-yard, 200-yard and 400-yard dash. How can he calculate his speed for each race?
Distance divided by time
What does Newton's 2nd law say?
F = M x A
An object with a mass of 10 grams accelerates at 5 meters per second. What is the force?
50 newtons
What is every object on Earth subject to?
Gravity
What does a straight line on a speed graph represent?
a) different speeds
b) moving backwards
c) steady speed
Steady speed
A scooter travels 50 meters in 20 seconds. How many meters will it travel in 60 seconds if it continues to travel at the same speed?
150 meters
What does Newton's 3rd law say?
For every action there is an equal and opposite reaction.
An object with a mass of 500 grams accelerates at 2 meters per second. What is the force?
1000 N
True or False: mass has to do with gravity
False
The formula for calculating speed is Speed=Distance/Time. A train travels 300 miles in 2 hours during a trip. What was the average speed of the train during the trip?
150 mph
A car travels at a constant speed of 60 miles per hour. Approximately how long will it take the car to travel 120 miles?
2 hours
What does Newton's 4th law say?
There is not a 4th law.
What is force measured in?
Newtons
Name one kind of friction that we learned about.
Dry, rolling, static
Who discovered the laws of motion?
Isaac Newton