Newton's First Law
State Newton's first law.
An object at rest remains at rest and an object in motion remains in motion unless acted on by an unbalanced force.
State Newton's second law
There is a relationship between force, mass, and acceleration. It can be represented with the equation f=ma
State Newton's 3rd law
For every action there is an equal and opposite reaction force.
A car traveled 20 miles in half an hour. What was the car's speed?
40 mph
A golf ball flies after being hit by the golf club
1st Law
What is the tendency of an object at rest to remain at rest or, if moving to continue moving at a constant velocity.
Inertia
Force is measured using what units?
Newtons
Which type of force is stronger? Action or reaction forces?
They are balanced forces (equal in strength)
A bird was flying 5 meters per second. It increased its speed to 8 meters per second over the course of 12 seconds. What was the acceleration of the bird?
0.25 meters per second squared
The Earth keeps the moon in orbit and the moon pulls at the Earth.
Law 3
If an object has a lot of mass, it will have _________ inertia
A lot of
What is the force required for a 2 kg car to accelerate forward at 4.0 m/s2 (INCLUDE A LABEL)
What is 8 N
A kid bumps into a table. If he hits the table with a force of 3 N, how much force did he get hit with?
3N
The escalator at the mall goes at a speed of 1 meter per minute. If someone walking at a pace of 5 meters per minute goes up the up escalator, what is their resulting velocity?
6 meters per second up
A 6kg object hit with a force of 12 N will accelerate at a rate of 2 m/s2
Law 2
If a car with a ladder on the roof that is not secure suddenly stops, what will happen to the ladder?
The ladder will continue forward until an unbalanced force stops it
What is the acceleration of a boy on a skateboard if the unbalanced forward force on the boy is 10N and the total mass is 5 kg? (INCLUDE A LABEL)
What is 2 m/s2
Allie jumps from a skateboard. What direction(s) will she and the skateboard go?
In opposite directions
A marble and a basketball are hit with the same amount of force. Which one has more acceleration?
The marble
The groceries slide around in the trunk of the car when it comes to a sudden stop.
Law 1
What causes an object to change its motion?
An unbalanced force
Object A has a mass of 50 kg and is accelerating at a rate of 4 m/ s2. Object B has a mass of 20 kg and is accelerating at a rate of 8 m/s2. Object C has a mass of 10 kg and is accelerating at a rate of 30m/s2. Which object was pushed by the weakest force?
Object B
If forces are always in balanced pairs, how can unbalanced forced exist?
Though forces are always in balanced pairs, the balanced forces are applied to different objects. Each object only gets 1 force, causing the object to accelerate and move.
A hiker walks on a 7 mile winding path for 3 hours to a lookout spot. She stops for 1 hour to eat a snack and take pictures. She then takes a shorter path back to the entrance. The last path is 5 miles long and takes 2 hours to complete. What was her average speed over the whole hike?
2 miles per hour
A horse can pull a wagon full of people but a turtle can't.
Law 2