Laws of Motion - Newton's 1st & 2nd

The two measurements necessary for calculating average speed are (pick two)
1. distance.
2. acceleration.
3. velocity.
4. time.
What is the acceleration of a car that maintains a constant velocity of 100 km/h for 10 s?
1. 0
2. 10 km/h/s
3. 10 m/s/s
4. 1000 km/h/s
As an object falls freely,
1. its velocity increases.
2. its acceleration increases.
3. both its acceleration and its velocity increases.
4. neither of these increases.
The gain in speed each second for a freely falling object on Earth is about
1. 5 m/s.
2. 10 m/s.
3. 0.
4. this depends on the initial speed.
If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by about
1. a variable amount.
2. 10 m/s.
3. 15 m/s.
4. 5 m/s.
If a freely falling object were somehow equipped with an odometer to measure the distance it travels, then the amount of distance it travels each succeeding second would be
1. less and less.
2. greater than the second before.
3. constant.
Ten seconds after starting from rest, a freely falling object will have a speed of about
1. 100 m/s.
2. 10 m/s.
3. 50 m/s.
4. more than 1000 m/s.
If an object falls with constant acceleration, the velocity of the object must
1. continually decrease.
2. be constant also.
3. continually change by varying amounts, depending on its speed.
4. continually change by the same amount each second.
A heavy object and a light object are dropped at the same time from rest in a vacuum. The lighter object reaches the ground
1. at the same time as the heavy object.
2. later than the heavy object.
3. sooner than the heavy object.
A ball is thrown upwards and caught when it comes back down. Neglecting air resistance, the speed with which it is caught is
1. the same as the speed it had when thrown upwards.
2. less than the speed it had when thrown upwards.
3. more than the speed it had when thrown upwards.
An object travels 12 m in the first second of travel, 12 m again during the second second of travel, and 12 m again during the third second. Its acceleration in meters per second per second is
1. 12.
2. 6.
3. 0.
4. 24.
An object is in free-fall. At one instant, it travels at a speed of 20 m/s. Exactly 1 s later, its speed is about
1. 25 m/s.
2. 30 m/s.
3. 40 m/s.
4. 20 m/s.
Disregarding air resistance, objects fall at constant
1. speed.
2. distances each successive second.
3. velocity.
4. acceleration.
Starting from rest, the distance a freely falling object will fall in 10 s is about
1. 10 m.
2. 500 m.
3. 100 m.
4. 50 m.
If you drop an object, it will accelerate downward at a rate of about 10 m/s/s. If you instead throw it downwards, its acceleration (in the absence of air resistance) will be
1. much less than 10 m/s/s.
2. much greater than 10 m/s/s.
3. about 10 m/s/s.
In each second of fall, the distance a freely falling object will fall is
1. about 10 m.
2. about 5 m.
3. increasing.
4. the same, but not 5 m or 10 m.
A car accelerates at 2 m/s/s. Assuming the car starts from rest, how far will it travel in 10 s?
1. 2 m
2. 100 m
3. 10 m
4. 40 m
Ten seconds after starting from rest, a car is moving at 60 m/s. What is the car's acceleration in meters per second per second?
1. 0.3
2. 60
3. 6.0
4. 10
When a rock thrown straight upwards gets to the exact top of its path, its velocity is
1. about 10 m/s and its acceleration is zero.
2. about 10 m/s and its acceleration is about 10 m/s/s.
3. zero and its acceleration is zero.
4. zero and its acceleration is about 10 m/s/s.
Consider drops of water that leak from a dripping faucet. As the drops fall, they
1. get closer together.
2. remain at a relatively fixed distance from one another.
3. get farther apart.
If a baseball being thrown goes from zero to 30 m/s in 0.1 s, what is its average acceleration?
1. 3000 m/s/s
2. 30 m/s/s
3. 3 m/s/s
4. 300 m/s/s
If a rocket accelerates from rest at a rate of 50 m/s/s for 10 s, the distance it will cover during this time is about
1. 2500 m.
2. 5000 m.
3. 500 m.
4. 250 m.
Drop a rock from a 5-m height and it accelerates at 10 m/s/s and strikes the ground 1 s later. Drop the same rock from a height of 2.5 m and its acceleration of fall is
1. the same.
2. more.
3. about half.
A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always
1. opposite its velocity.
2. directed upward.
3. in the direction of motion.
4. directed downward.
What is the speed of an object at rest?
1. 0.0 m/s
2. 9.8 m/s
3. 1.0 m/s
4. 9.81 m/s
Acceleration is
1. displacement.
2. velocity.
3. the rate of change of displacement.
4. the rate of change of velocity.
When velocity is positive and acceleration is negative, what happens to the object's motion?
1. The object slows down.
2. Nothing happens to the object.
3. The object speeds up.
4. The object remains at rest.
What does the measurement of 4.0 m/s represent?
1. green
2. red
3. orange
4. yellow
What does the measurement of 3.0 m/s^2 represent?
1. green
2. red
3. orange
4. yellow
What does the measurement of 5.0 s represent?
1. green
2. red
3. orange
4. yellow
In order to determine the final velocity after 5.0 s, which equation would be most useful?
1. blue
2. indigo
3. violet
4. white
In order to determine the magnitude of the cart's displacement after the first 6.0 s of its motion, which equation would be most useful?
1. blue
2. indigo
3. violet
4. white
A sports car accelerates at a constant rate from rest to a speed of 30.0 m/s in 5.00 s. What is the acceleration of the sports car?
1. 6.00 m/s^2
2. 150 m/s^2
3. 35.0 m/s^2
4. 0.167 m/s^2
A sports car accelerates from rest at a constant rate of 3.00 m/s/s for 5.00 s. What is the displacement of the sports car?
1. 37.5 m
2. 15.0 m
3. 0.60 m
4. 7.5 m
Acceleration due to gravity is also called
1. negative velocity.
2. free-fall acceleration.
3. displacement.
4. instantaneous velocity.
Which equation would allow you to determine the rock's displacement after 2.00 s?
1. blue
2. indigo
3. violet
4. white
What equation will allow you to determine the speed of the coin as it hits the ground?
1. blue
2. indigo
3. violet
4. white
Which would hit the ground first if dropped from the same height in a vacuum, a feather or a metal bolt?
1. the feather
2. the metal bolt
3. They would hit the ground at the same time.
4. They would be suspended in a vacuum.
Which would fall with greater acceleration in a vacuum, a leaf or a stone?
1. the leaf
2. the stone
3. They would accelerate at the same rate.
4. There can be no acceleration in a vacuum.
The inertia of an object is related to its ____.
1. mass and speed
2. mass and force
3. mass only
4. speed only
Newton's first law is also known as the law of ____.
1. inertia
2. force pairs
3. universal gravitation
4. unbalanced forces
The rate of change in the speed of an object is known as ____.
1. velocity
2. displacement
3. acceleration
4. equilibrium
Acceleration of an object must be caused by a force that is ____.
1. positive
2. zero
3. negative
4. not zero
The metric unit of force preferred by scientists is the ____.
1. kilogram
2. newton
3. mima
4. pound
What is the net force on the block?
1. 2.0 kg
2. 10 N total
3. 6.0 N to the right
4. 9.8 kg • m / s^2 down
What is the acceleration of the block?
1. 3.0 m/sec^2 to the right
2. 3.0 m/sec^2 to the left
3. 5.0 m/sec^2 to the right
4. 5.0 m/sec^2 to the left
Which equation below would most easily allow you to determine the acceleration of the block?
1. a = F / m
2. t = x / v
3. a = (vf - vi) / t
4. x = vi(t) + 1/2a(t)2
Terminal speed occurs when ____.
1. the air resistance of an object increases
2. an object starts to slow down due to air resistance
3. the force of gravity is balanced by the air resistance of an object
4. the acceleration due to gravity equals zero

Laws of Motion - Newton's 1st & 2nd

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