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Mr Brokaw's Forces Quiz Flashcards | StudBud
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Mr Brokaw's Forces Quiz
Mr Brokaw's Forces Quiz
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Answers
1
A baseball is flying through the air after being thrown. What force is acting on the ball? (Assume no air resistance)
The Friction Force
The Normal Force
The force of the throw
The force of gravity
2
What situation could this force diagram be applied to?
A train runs along its tracks at constant velocity
A hockey puck slides over frictionless ice
A skydiver has his parachute deployed, falling at constant velocity
A basketball rolls off a table and enters free fall.
3
If the mass of an object doubles, what happens to the acceleration, keeping force equal?
Nothing
It triples
It doubles
It halves
4
Mass
Changes due to location
Is different on Jupiter than on Mars
Is easy to change
Is the same no matter where you are
5
A bowling ball is rolling across the ground (with friction)
after
being pushed. What force is not acting on the ball?
The Normal Force
Force of the Push
Friction
Gravity
6
Air resistance on a falling object
Is constant
Does not exist on any falling objects
Starts small, then increases
Starts big, and decreases
7
If the net force on a cart doubles, what happens to the acceleration?
It triples
It halves
It doubles
Nothing
8
Weight
Is the same no matter where you are
Is greater on Earth than on Jupiter
Is greater on the moon than on Earth
Changes based on location
9
Inertia is the concept that
All objects come to rest
Forces combine and cancel
Moving objects tend to keep moving and objects at rest tend to stay at rest
you can combine all of Newton's 3 Laws to create a Super Law
10
A ball is sliding across a frictionless surface. What is required to keep it moving at the same speed?
A force in the direction of it's motion
Friction will help to keep it moving
A force against the direction of it's motion
Nothing
11
A 100 kg person is standing in an elevator. The elevator accelerates upwards at 2 m/s^2. What is the scale reading?
1180 N
780 N
580 N
980 N
12
What forces are acting on the object shown below?
Friction
Normal Force
Gravity
Gravity and Normal Force
13
Which planet has the most gravitational pull?
Earth
Jupiter
Moon
Pluto
14
What does Newton's 2nd Law compare the relationships between?
Force, Mass, and Acceleration
Force, Gravity, and Mass
Force, Acceleration, and Velocity
Force, Mass, and Velocity
15
An astronaut has a mass of 90 kg. What is his weight on earth? (g=10 m/s^2)
1000 N
90000 N
90 N
900 N
16
A 30kg block is sliding across the ground. The coeffic. of friction is .35 - What is the Friction Force?
30 N
102.9 N
300 N
294 N
17
The force diagram below can apply to the following situation:
A ball is falling through the air
Austin pushes a box across a rough horizontal surface
A hockey puck is pushed across frictionless ice
A skier is skiing down a mountain
18
What is Newton's 1st Law also called?
The Law of Forces
The Law of Inertia
The Law of Motion
The Law of Physics
