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WorksheetsDynamics Review
Total questions: 36
Worksheet time: 2hrs 48mins
In the absence of a net force, a moving object will
Slow down and eventually stop
Stop immediately
Turn Right
Move with Constant Velocity
Turn Left
When a cat sleeps on a table, the net force on it is
Zero
Acting upward
Acting downward
directed in the horizontal direction
More information required
When the engines on a rocket ship in deep space, far from any other objects, are turned off, it will
slow down and eventually stop
stop immediately
turn right
move with constant velocity
turn left
If a book on the dashboard of your car suddenly flies towards you, the forward velocity of the care must have:
decreased
increased
change direction to the right
become zero
changed direction to the left
In order for a rocket ship in deep space, far from any other objects, to move in a straight line with constant speed, it must expert a net force that is:
Proportional to its mass
Proportional to its weight
Proportional to its velocity
zero
Proportional to its displacement
Which Newton's Law can explain the following statement that we often see on the highway display: "Buckle up - it's the State Law"?
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Gravitational Law
None of the above
A spacecraft travels at a constant velocity in empty space far away from any center of gravity. Which of the following about the force applied on the spacecraft is true?
The applied force is equal to its weight
The applied force is slightly greater than its weight
The applied force is slightly less that its weight
The applied force must be perpendicular to its velocity
No applied force is required to maintain a constant velocity.
A boy rides a bicycle at a constant velocity. Which of the following about the net force is true?
There is a net force acting in the velocity direction.
There is a net force acting opposite to the veolicty direction
The net force is zero
There is a net force acting perpendicularly to the velocity direction
None form the above answers.
A passenger standing in a moving bus, facing forward suddenly falls forward. This can be an indication of which of the following?
The bus speeds up
The bus slows down
The bus doesn't change its velocity
The bust turns to the right
The bus turns to the left
A passenger standing in a moving bus, facing forward suddenly falls backward. This can be an indication of which of the following?
The bus speeds up
The bus slows down
The bus doesn't change its velocity
The bust turns to the right
The bus turns to the left
A passenger standing in a moving bus, facing forward suddenly falls to the right. This can be an indication of which of the following?
The bus speeds up
The bus slows down
The bus doesn't change its velocity
The bust turns to the right
The bus turns to the left
The acceleration of an object is proportional to
The net force acting on it
its positon
its velocity
its mass
it's displacement
The acceleration of an object is inversely proportional to
The net force acting on it
its positon
its velocity
its mass
it's displacement
A net force F accelerates a mass m with an acceleration a. If the same net force is applied to mass 5m, then the acceleration will be.
5a
25a
a/5
a/25
a/10
A net force F acts on a mass m and produces and acceleration a. What acceleration results if a net force 3F acts on mass 6m?
a/2
8a
4a
2a
a/4
A loaded truck collides with a car causing huge damage to the car. Which of the following is true about the collision?
The force on the truce is greater than the force on the car
The force on the car is greater than the force on the truck
The force on the truck is the same in magnitude as the force on the car
During the collision the truck makes greater displacement than the car
During the collision the truck has greater acceleration than than the car
When a baseball is struck by a bat, the force of the bat on the ball is equal and opposite to the force of the ball on the bat. This is an example of:
Newton's first law
Newton's second law
Newton's third law
Newton's law of gravitation
None from the above
If you exert a force F on an object which has a much greater mass than you do, the force which the object exerts on you will:
be of magnitude F and in the same direction
Be of magnitude F and in the opposite direction
be of much less magnitude than F
Be of much greater magnitude than F
be zero
Newton's Third Law refers to "action-reaction forces". These forces always occur in pairs and :
sometimes act on the same eobject
always act on the same object
may be at right angles
never act on the same object
always act at right angles
Action-reaction forces are
equal in magnitude and point in the same direction
equal in magnitude and point in the opposite direction
unequal in magnitude put point in the same direction
unequal in magnitude and point in opposite directions
cancel each other out
A car traveling at 40 m/s strikes a mosquito. Which of the following is the true statement?
The force on the mosquito is greater than the force on the car
The force on the mosquito is equal to the force on the car
The force on the mosquito is smaller than the force on the car
The damage to the mosquito is equal to the damage on the car
None of the above
The Earth pulls down on a railroad wagon with a force of 200kN. Which of the following is the reaction force?
The wagon pulls up on the Earth with 200kN
The wagon pushes down the railroad with 200kN
The railroad pushes up the wagon with 200 kN
The buoyant force pushes up the wagon with 200 kN
The wagon pushes down the Earth with 200 kN
A railroad wagon pushes down on a railroad with force 200kN. Which of the following is the reaction force?
The wagon pulls up the Earth with 200kN
The wago pushes down the railroad with 200 kN
The railroad pushes up the wagon with 200 kN
The buoyant force pushes up the wagon with 200 kN
The wagon pushes down the Earth with 200 kN
Earth pulls downward on a pen, of mass m, which is sitting on a table; the magnitude of the force is mg. If that is called the action force, what is the reaction force?
The table pushing up on the pen with a force equal to mg
The pen pushing down on the table with a force equal to mg
The table pushing down on the floor with a force equal to mg
The pen pulling upward on Earth with a force equal to mg
The pen pulling up on the table with a force equal to mg
A traffic light is suspended from a cable. Earth pulls downward on the traffic light with a force of 1500 N. If this is the "action force," what is the "reaction force"?
The cable pulling upward on the traffic light with a 1500 N force
The traffic light pulling downward on the cable with a 1500 N force
The traffic light pulling upward on Earth with a 1500 N force
Earth pulling doward on the able with a 1500N force
The cable pulling up on Earth with 1500 N
A soccer player kicks a soccer ball with a force of 1300N. The soccer ball hits the player with a force of
less than 1300 N
exactly 1300 N
more than 1300N
0n
None of the above
Mass and Weight
Both have the same measuring units
Both have different measuring units
Both represent force of gravity
Both represent measure of inertia
None from the above
The acceleration due to gravity is higher on Jupiter than on Earth due to it being omre massive. The mass and weight of a rock on Jupiter compared to that on Earth would be
same, more
same, less
more, more
more, less
same, same
Which of the following is an example of a force which acts at a distance?
Tension
Gravity
Statice Friction
Kinetic Friction
Normal Force
A ball is thrown straight up. At the top of its path, the magnitude of the net force acting on it is
less than zero
between zero and mg
equal to mg
greater than mg
none from the above
A hammer and a pebble are dropped simultaneously from the same height. Neglect air resistance.
The hammer accelerates faster because it is heavier
the hammer accelerates slower because it has more inertia
the pebble accelerates faster because it has a smaller mass
they both accelerate at the same rate because the have the same weight to mass ratio
the pebble accelerates slower because it has a smaller mass
An elevator of mass M is pulled upwards at a constant velocity by a cable. What is the tension in the cable (neglecting the mass of the cable)?
less than zero
between zero and Mg
equal to Mg
greater than Mg
zero
An elevator of mass M is pulled upwards by a cable; the elevator has a positive, but decreasing velocity. What is the tension in the cable (neglecting the mass of the cable)?
less than zero
between zero and Mg
equal to Mg
greater than Mg
zero
An elevator of mass M is pulled upwards by a cable; the elevator has a positive, increasing, velocity. What is the tension int he cable (neglecting the mass of the cable)?
less than zero
between zero and Mg
equal to Mg
greater than Mg
zero
A horizontal force is exerted on object so that it accelerates at a constant rate across a rough horizontal surface (friction cannot be neglected). The applied force is then doubled; what happens to the object's acceleration?
It increases to more than double its original value
increases to exactly double its original value
It increases to less than double its original value
it increases somewhat
It drops to zero
A box is being pushed by a constant force along a horizontal surface. If the object's velocity is constant, we can infer that there is _______________ acting on the box.
a frictional force
a net downward force
no frictional force
a net force upward
a net force in the acceleration direction
