Newton's 1st Law
Finish the sentence: An object in motion stays in motion, and an object at rest stays at rest unless __________________________
Acted upon by an outside force (or similar answer that means the same)
What is the mathematical formula for Newton's 2nd Law?
Force = Mass X Acceleration
Finish the sentence: For every action __________________________
There is an equal and opposite reaction
Finish the sentence: Gravity pulls all objects ____________
Gravity pulls all objects towards each other
True or False - Mass and Weight mean the same thing
False
Newton's 1st law is also known as the law of __________?
Law of Inertia
What is the unit of measurement for force?
Newtons
True or false: If I push a door with 100 N of force, it is pushing back on me with 90 N of force?
False (100 N of force)
What is the rate of acceleration for gravity (in meters per second squared)
9.8 Meters per second squared
Earth's moon is large enough to have enough gravitational force to pull itself into a sphere.
True or false: A Meteor traveling through space will float on forever if it never encounters an outside force
True
Solve the equation - A 10kg box is riding down a conveyer belt at a speed of 5.7 m/s. How much force is needed to move this box?
57 Newtons
A karate master tries to break a wooden board with a karate chop. The wooden board can only withstand 500 Newtons of force upon it. The karate master used 550 Newtons of force with his karate chop. The wooden board breaks in half. Does it still react with 550 Newtons of force?
Yes, there will always be an equal and opposite reaction, even if the other object breaks.
Forward motion of the satellite launch plus the downward motion of gravity trying to pull the satellite back down to Earth.
Gravity's rate of acceleration on Earth is 9.8 m/s. On the moon, that rate is 1.625 m/s.
An astronaut drops his cell phone onto the moon surface. His phone weighs 1.2 kg. At what rate did his phone fall?
1.95 m/s
You are driving in a car at 50mph and have a bag of groceries on the passengers seat. A deer runs out in front of your car and you have to slam on the brakes to avoid an accident. However, the groceries go flying as you slam on the brakes. Explain why this happens.
Due to Newton's 1st law, The groceries are the object in motion. While the car has brakes, the groceries do not. So even though the car stops, the groceries keep traveling at 50mph and do not stop until they hit the floor.
Solve the equation - a car weighing 500 kg travels down the highway at a rate of 98 m/s. How much force is being used to move this car
49,000 Newtons
During a baseball game, the batter exerts force on the ball when the batter hits the ball. The ball flies towards the outfield, but the bat does not fly backwards. Explain why the bat doesn't fly backwards
The batter (the outside force) Is exerting force on the bat which prevents it from flying backwards
What is the formula for Gravitational Force
Gravitational Force = Mass x Gravity
Explain how gravity from the moon affects tides in our Lakes and Oceans.
Gravity from the moon pulls on the earth, which causes the water to shift and change levels.
If you were in outer space and fired a cannonball out of a rocket ship, how much force would be needed to keep the cannonball moving?
No force needed. There is no gravity or forces in open space so the ball will float forever unless acted upon by an outside force.
Suppose a shopping cart is being pushed with 100 N of force. Now, lets say that force is doubled to 200 N. What happens to the rate of acceleration?
The rate of acceleration is also doubled (The mass of the cart remains the same)
The earth is so large that its acceleration is very small and not noticeable to the human eye.
Solve the equation - a satellite weight 1250 kg is hurling towards earth at Gravity's rate of acceleration (9.8 m/s). Calculate the gravitational force
12,250 Newtons
A satellite travels at 17,000 mph. Gravity's speed on Earth is 9.8 m/s. On Jupiter, gravity's speed is 29.4 m/s, equal to 3 times that of Earth's gravitational pull.
Knowing this information, how fast would a satellite have to travel in order to orbit Jupiter?
51,000 mph