Show:
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Kinetic Energy
Potential Energy
100
Newton's first law says that objects ____________ want to _________ and objects ___________ want to ___________, unless acted upon by an unbalanced force.
Newton's first law says that objects at rest want to stay at rest and objects in motion want to stay in motion, unless acted upon by an unbalanced force.
100
What is the equation which represents Newton's 2nd law?
F = ma
100
Newton's 3rd law says: For every ____________ there is an _______________________.
For every action there is an equal and opposite reaction.
100
Kinetic energy is the energy of ________.
Motion/ Movement
100
Potential energy is _________ energy.
stored energy
200
A box is pushed with a force of 3 N to the right and 7 N to the left. Draw a force diagram of this situation and calculate the net force.
Net force = 4 N Left
200
According to Newton's 2nd law, as mass increases, acceleration ____________.
Decreases
200
Name the reaction force: The woman pushes on the door.
The door pushes on the woman
200
To find the kinetic energy of an object you must know ________ & ________.
mass and velocity
200
What three things do you need to know in order to calculate the gravitational potential energy of an object?
gravity, mass of object, height of object.
300
A chair is pushed to the right with a force of 8 N. The force of friction acting on the chair is 1.5 N. Draw a force diagram of the situation and calculate net force.
Net force = 6.5 N
300
According to Newton's 2nd law, as force increases, acceleration __________
Increases
300
Name the reaction force: The bird wings push down on the air molecules.
The air molecules push up on the bird wings
300
A 2 kg basketball is thrown at 6 m/s across the court. What is the kinetic energy of the basketball?
36 J
300
A 4 kg flower pot is sitting on a ledge 6 m above the ground. What is the GPE of the flower pot?
235.2 J
400
A bowling ball is rolled across a wood floor. What does Newton's first law say will happen to the ball?
The ball will eventually slow and stop because of the force of friction
400
A 23 kg shopping cart accelerates at 2 m/s2 through the grocery aisle. What is the force on the cart?
46 N
400
Name the action-reaction pair: A kid jumps up and down on a trampoline. _________________ & ________________
Kid pushes down on trampoline & trampoline pushes up on kid.
400
An ice skater is traveling at 6 m/s and has a kinetic energy of 1200 J. What is the mass of the skater?
66.67 kg
400
A 4.5 kg water bottle sits on the top of a counter with 65 J of potential energy. How high is the counter it is sitting on?
1.47 m
500
If you throw a rock in outer space, according to Newton's 1st law, what will happen to the rock?
The rock will continue to move at the same velocity unless acted upon by an unbalanced force
500
A car accelerates at a rate of 16 m/s2 and has a force of 4800 N. What is the mass of the car?
300 kg.
500
Name the action-reaction pair: The moon rotates around the earth _________________& ____________________
The earth pulls on the moon & The moon pulls on the earth
500
A 500 kg plane is traveling has a kinetic energy of 100,000 J. What is the velocity of the plane?
20 m/s
500
A book has a potential energy of 96 J as it sits on a 8 m high shelf. What is the mass of the book?
1.22 kg