Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Misc.
100
Newton's 1st Law is also called Newton's Law of ______________________.
Inertia.
100
What does Newton's 2nd Law depend on?
Force, mass, and acceleration
100
What is Newton's 3rd Law?
The forces that two interacting bodies exert on each other are always equal in magnitude and opposite in direction.
100
What is the gravitational acceleration on Earth?
9.81 m/s/s
200
What is Newton's 1st Law?
An object in motion stays in motion or an object at rest stays at rest, and will remain in their state of motion unless acted upon by an unbalanced force.
200
What are the units for force, mass, and acceleration?
Force = Newtons (N)
Acceleration = meters/second2 (m/s/s)
Mass = kilograms (kg)
200
What is a vector?
A quantity that has both magnitude and direction.
200
Consider this situation:
A football travels upward and rightward through the air.
List the forces acting upon the football.
Air Resistance, Gravity
300
Inertia is the ____________________ to change its state of _________________________.
resistance, motion
300
What is the acceleration of the following object?
12 m/s/s
300
Give an example of force-pairs.
Answers may vary.
Example: The force of you standing on the ground and the force the ground puts on you.
300
Which of the following statements is TRUE?
a.) A mountain is hard to move because the force it applies on the Earth is far too great to overcome.
b.) Carpet has a greater coefficient of friction compared to tile flooring.
c.) Seatbelts help to prevent injury buying helping to decrease the mass of the person in order to lessen the impact of the net force.
b.) Carpet has a greater coefficient of friction compared to tile flooring.
400
How does the inertia of a giraffe compare to the inertia of a mouse?
More mass = more inertia
Therefore, the giraffe has more inertia than the mouse because it has a greater mass.
400
A child is pushing a box leftward across a carpeted floor. The frictional force is 24.6 N and the net force is 13.4 N. What is the magnitude of the applied force?
24.6 N - 12.4 N =
11.2 Newtons (N)
400
While flying in the air, a bird strikes the windshield of a plane and does not quite make the flight back home. The bird hit the plane and the plane hit the bird.
Which of the two forces is greater; The force on the bird or the force on the plane?
The force is equal of the bird on the plane and the plane on the bird.
400
An object has an acceleration of 18.0 m/s/s. If the net force was doubled and the mass was one-third the original value, then the new acceleration would be _____ m/s/s.
12.0 m/s/s
500
Explain how headrests help to decrease the severity of neck injuries during car crashes.
The headrest helps to stop the motion of your head swinging back due to the force of the crash. The stopping of the head allows for less fracture/cracks of the neck bone.
500
A rightward force of 83.2 N is applied to a 5.39-kg object to accelerate it to the right. The friction force between the object and the surface is 32.7 N. What is the acceleration of the object?
(must include units and be rounded to the nearest hundredth)
9.37 m/s/s
500
A worker is applying a force on a large crate to move it rightward at a constant speed. Assume negligible air resistance.
What will the Force Diagram (FBD) look like if the worker stops pushing and the rightward-moving crate is in a state of slowing down?
500
A child pushes a box across the floor rightward.
Assume negligible air resistance.
Draw a Force Diagram (FBD) that shows the 3.0-kg box to have a southward acceleration of 2.0 m/s/s.
Must include the magnitude of each force.
Answers may vary. As long as the FNet = 6 N South
