Newtons Laws 1
TThis is the Law of Inertia
Newtons First law
The force that attracts an object toward the center of the earth
Gravity
The SI unit of force is this.
Newton
What is the force if the mass is 3 kg and the acceleration is 3 m/s2?
9 newtons
what is the acceleration if the velocity changes by 1 m/s for 10 seconds if the object was at rest to start
1 m/s2
According to Newton’s Second Law, increasing the force applied to a mass has this result.
Increases acceleration of the object
A box is being pushed to the right across the floor. What is the force that opposes this motion?
Friction
Newton's third law states...
Any action has an equal and opposite reaction.
When an object is not moving, this total net force
0 newtons
A car moving 50 m/s sees a deer!!!! they lock on the brakes at constant deceleration of 10 meters per second for 2 seconds. The deer moves out of the way. What is the cars new speed?
30 meters er second
Which law talks about an object at rest or moving with constant velocity remaining in that state unless a non 0 external force acts on it
Newton’s First
A bowling ball collides with a set of bowling pins (at rest) with a force of 15N. What is the force the pins exert on the bowling ball.
15N
formula for acceleration.
A = (delta) V / T
What is the velocity of an object that moved 100 meters in 5 seconds
v= 20 m/s
What is the air resistance of a parachute descending (constant speed) with a 100 kg man. The acceleration of gravity is 9.8 m/s2
980 newtons
An object at rest has this velocity.
Zero
Average velocity of running around a 1 mile track in 8 minutes (in miles per minute)
0 miles per minute
If you see a graph (velocity and time) in the shape of the letter 'V' describe what is happening in terms of acceleration,
deceleration, then acceleration
How long does it take for a car moving at 40 miles per hour to go 10 miles?
1/4 hour or 15 minutes
A car is moving backward at a constant speed of -8 mph, what is the acceleration (deceleration) of the car
0 mph
Which law of motion states, "For every action there is an equal and opposite reaction"
Third Law
the average speed of a person running around a track in 8 minutes (in miles per minute)
0.125 or 1/8 mile per minute
What is the formula to calculate speed?
S=D/T
what is the velocity of a bicycle that took 10 minutes to go 2 miles (in miles per hour)
12 miles per hour 2divide by 1/6 ----- Keep change flip
2 parts! A 1000 kg car goes from 10 m/s to 30 m/s in 4 seconds - what force is the engine putting out?
Acceleration is 20/4 = 5 m/s2 them F=MA F= 1000x5 = 5000 newtons.