Force Study Guide
What is the acceleration of the box in the picture to the right?
(F=ma) 12m/s^2
If the block in the picture to the right has an acceleration of 1 m/s2, what would be the block's mass?
(F=ma) 2kg
A 500 N force is applied to a 25 m/s2 object. The mass of the object is
20kg. (F=ma)
What is the net force on the block to the right
2n to the left
Rank the following objects from LEAST momentum to MOST momentum.
2nd falling feather 1st parked car 3rd fast car
What is the Force of the box in the picture to the right?
300N
Rank the following objects from LEAST inertia to MOST inertia.
3rd 18-wheeler 1st pen 2nd textbook
Calculate the force on an object that has a mass of 10 kg and an acceleration of 4 m/s2
40N (F=ma)
An object that is falling freely has a constant what?
Acceleration
A friction like force that opposes the motion of objects that move through
Air resisitance
A group of students is playing tug-of-war. The students on both sides of the rope are pulling with an equal force so that the rope is not moving. This is an example of what type of force?
Balance Force
Why does someone not wearing a seatbelt in a car fly forward when the car stops suddenly? Make sure to include which law explains this
Because objects in motion resist a change in motion, due to inertia (Newton's 1st Law)
Why does it take more effort to make a bowling ball accelerate 25 m/s2 than to make a tennis ball accelerate 25 m/s2? Make sure to include which law explains this.
Because the bowling ball has more mass, so it will need a greater force to accelerate. (Newton's 2nd Law)
Which two quantities are measured in the same units?
Force and weight
The attraction any two objects have on one another
Gravity
A man weighing 800 N is standing on a chair. In order to support the man, what force is the chair exerting?
Greater than 800N
In the picture to the right, if the card were quickly pulled off the cup like the arrow suggests, what property would explain why the coin falls into the cup rather than moving with the card?
Inertia
Related to the amount of force needed to change an object's motion
Momentum
The relationship among mass, force, and acceleration is explained by
Newton's 2nd Law of Motion
A net force acting on an object causes the object to accelerate in the direction of the net force
Newton's 2nd law
"To every action there is an equal and opposite reaction" describes which law?
Newton's 3rd Law
An object will move at a constant velocity unless an unbalanced
Newtons 1st law
The highest velocity a falling object will reach
Terminal velocity
If the same force is applied to each of the balls pictured below, which one will have the LEAST acceleration?
The bowling ball
A firefighter feels the hose pushing back onto him as he uses it to put out a fire. What is the most likely cause of this?
The escaping water exerts an equal and opposite force on the hose.
A student drops a feather and rock at the same time from Mrs. Taylor's window. If air resistance wasn't a factor, what should she observe?
The rock and feather will fall at the same rate.
Which of the following best describes how a swimmer moves through the water?
The swimmer pushes backward on the water and the water pushes with an equal but opposite force back on the swimmer.
Newtons measure what?
Weight
How does a trampoline work? Make sure to include which law explains this.
Weight is a downward force on the trampoline then the trampoline pushes back an equal and opposite force (Newton's 3rd Law).
According to Newton's laws, for any object, the greater the force that's applied to it, the greater its
acceleration will be
The upward force on an object falling through the air is
air resistance
Push or pull one body exerts on another
force
When two forces on the same object are equal and opposite, these forces are called blank forces
frictional
As the mass of an object increases, its inertia will
increase
Tendency of an object to resist changes in motion
inertia
The size of the gravitational force between two objects depends on their
mass and the distance between them.
The blank of an object does not change, but its blank can be based on its location
mass,weight
An astronaut is planning a trip to a newly discovered planet. According to the Law of Universal Gravitation, the astronaut's weight on the new planet will be greater than his weight on Earth if:
the new planet has more gravity then earth
THe force of gravity on an object
weight
