Newton's Laws
You hit a wall with a stick. According to Newton's 3rd Law, the equal but opposite reaction is what????
The stick hitting back against the wall
Two football players collide. Which player exerts more force on the other?
A. The one with more mass
B. The one who is taller
C. The one who tackles higher up.
A - More mass
A student is running a 400 meter race. He finishes the race in 19 seconds. What what his speed?
Speed = 21 m/s
What is the energy of motion called?
Kinetic Energy
The combination of all forces acting on an object is called what?
Net Force
What is Newton's first law of motion?
Objects want to remain in the position they're in and won't move unless acted on by an unbalanced force.
Students are making paper airplanes to see which would fly the farthest based on mass. What is one constraint/limitation they would need to consider when conducting their experiment?
Answers will vary.
How much mass does an object have if it is accelerating at a rate of 5 meters per second squared and has a force of 10 N applied to it? M = F/A
2 kg
What object has more potential energy? An apple in a tree or an apple on the ground - why?
Apple in a Tree
Gravitational potential energy increases with height.
If an object has a net force of zero, what kind of force is it?
Balanced
Which of Newton's laws is represented by the formula F=ma?
2nd Law
Objects are considered balanced if they have a net Force of 0. Give two DIFFERENT examples of balanced forces.
Answers will vary but should include a constant speed and at rest example.
A car has a mass of 2300 kg. How much force is required to move it at an acceleration rate of 5 meters per second squared.
Formula: F=ma
11, 500 N
What is stored energy called?
Potential Energy
There are 4 students on each tug of war team. Below is how much force each person pulled with? What team won? What was the difference in force?
Team 1: 50N, 33N, 27N, 5N
Team 2: 44N, 47N, 18N, 15N
Which of Newton's laws is illustrated when a magician pulls a tablecloth out from under the dishes without disturbing them?
Newton's first law
A balloon is released in the air. Which of Newton's Laws is being followed and what are the action/reaction forces?
3rd Law
Action: Air coming out of balloon
Reaction: Balloon pushes back and moves around the room
A man travels North for a vacation. He drives 350 miles on his first day and 400 miles on his second day. What is his average velocity?
375 miles/day North
What two factors affect kinetic energy?
Mass and Speed
A science book with a mass of 2.8 kg is pushed along a table with a net force of 1 N. What is the book's acceleration? F=ma (you have to change it)
0.36 m/s/s
Answers will vary
What is the Unit of Measurement for:
Force -
Acceleration -
Mass -
Force - Newton
Acceleration - m/s2
Mass - kg, g etc
What amount of Force is needed to move an object with a mass of 5 kg across the room at an acceleration rate of 10 m/s/s?
F=ma
50 N
Where on a roller coaster does the cart have the maximum kinetic energy?
Bottom of a hill
If a baseball and a cannonball are dropped from the same height at the same time, which ball will hit with more force? Why?
Cannonball will hit with more force due to more mass.