Gravity is defined as...

The attractive force between any two objects of mass.

Which of the following is NOT a demonstration of Newton's Third Law?

The normal force and the force of gravity.

A car on the moon is easier to lift than a car on Earth because...

the moon's gravity is less than the Earth's.

While in a moving bus, you fall forward when the bus stops. What force caused you to fall?

There is not a force leading to your fall.

The ten objects in the picture have an equal mass. Which one requires the most force to lift?

They all require the same force to lift.

Newton's Third Law states that...

Forces between objects occur in equal and opposite pairs.

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Physics - Unit 2 Balanced Forces including Newton's 1st and 3rd Laws

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A review of #Force and #equilibrium for high school physics / mechanics.

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Questions 15

Answers

1
My mass is 75kg. Earth's mass is 5.97 x 10^24 kg. How strong is the force of gravity on me?
5970N
75N
750N
5.97E25 N
2
Gravity is defined as...
The attractive force between any two objects of equal mass.
The attractive force between any two objects of mass.
a constant 10 N/kg anywhere in the universe.
The pull large mass objects exert on small mass objects.
3
My mass is 75kg. Earth's mass is 5.97 x 10^24 kg. What force do I exert on the Earth?
4.78 x 10^25N
478,110N
750N
13,253N
4
A man is hanging from a rope on a cliff. His mass is 75kg. What is the tension in the rope?
750 kg
75N
75 kg
750N
5
Which of the following is NOT a demonstration of Newton's Third Law?
The tension in a rope pulled from both sides.
The normal force and the force of gravity.
My gravitational pull on the Earth and Earth's on me.
A cannon going backwards after firing a cannonball.
6
Another man is holding the rope on the top of the cliff. What stops him from falling?
Friction
Hope
Tension
Gravity
7
An object in motion...
must have an imbalance of forces acting on it.
must have at least one force acting on it.
must be accelerating.
none of the above.
8
A car on the moon is easier to lift than a car on Earth because...
cars don't work on the moon.
it has less mass on the moon.
you can exert more force on the moon.
the moon's gravity is less than the Earth's.
9
In the absence of an external force, a moving object will ...
slow down and eventually come to a stop
move with constant velocity
change direction
stop immediately
10
Normal forces are always ...
the same length.
perpendicular to a surface.
always opposite.
parallel to a surface.
11
While in a moving bus, you fall forward when the bus stops. What force caused you to fall?
normal force due to contact with the floor of the bus
There is not a force leading to your fall.
inertia
gravity
12
The team on the left is winning the tug of war. This must mean...
Fnet is to the left.
Fnet is to the right.
The leftward tension in the rope is greater than the right.
Their velocities are constant.
13
The ten objects in the picture have an equal mass. Which one requires the most force to lift?
It depends on exactly how large they are.
They all require the same force to lift.
Ball #1
Ball #10
14
Newton's Third Law states that...
An object in motion stays in motion until a force acts on it
For every force, there is an opposite force.
Forces between objects occur in equal and opposite pairs.
Force = mass x gravity
15
Who's that Pokemon?
IT'S PIKACHU!
Dratini
That's no Pokemon, that's some Chinese myth dragon.
Dragonair

Physics - Unit 2 Balanced Forces including Newton's 1st and 3rd Laws Flashcards | StudBud