- The two measurements necessary for calculating average speed are (pick two)
- What is the acceleration of a car that maintains a constant velocity of 100 km/h for 10 s?
- 0
- 10 km/h/s
- 10 m/s/s
- 1000 km/h/s

- As an object falls freely,
- its velocity increases.
- its acceleration increases.
- both its acceleration and its velocity increases.
- neither of these increases.

- The gain in speed each second for a freely falling object on Earth is about
- 5 m/s.
- 10 m/s.
- 0.
- 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
- a variable amount.
- 10 m/s.
- 15 m/s.
- 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
- less and less.
- greater than the second before.
- constant.

- Ten seconds after starting from rest, a freely falling object will have a speed of about
- 100 m/s.
- 10 m/s.
- 50 m/s.
- more than 1000 m/s.

- If an object falls with constant acceleration, the velocity of the object must
- continually decrease.
- be constant also.
- continually change by varying amounts, depending on its speed.
- 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
- at the same time as the heavy object.
- later than the heavy object.
- 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
- the same as the speed it had when thrown upwards.
- less than the speed it had when thrown upwards.
- 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
- 12.
- 6.
- 0.
- 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
- 25 m/s.
- 30 m/s.
- 40 m/s.
- 20 m/s.

- Disregarding air resistance, objects fall at constant
- speed.
- distances each successive second.
- velocity.
- acceleration.

- Starting from rest, the distance a freely falling object will fall in 10 s is about
- 10 m.
- 500 m.
- 100 m.
- 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
- much less than 10 m/s/s.
- much greater than 10 m/s/s.
- about 10 m/s/s.

- In each second of fall, the distance a freely falling object will fall is
- about 10 m.
- about 5 m.
- increasing.
- 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?
- 2 m
- 100 m
- 10 m
- 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?
- 0.3
- 60
- 6.0
- 10

- When a rock thrown straight upwards gets to the exact top of its path, its velocity is
- about 10 m/s and its acceleration is zero.
- about 10 m/s and its acceleration is about 10 m/s/s.
- zero and its acceleration is zero.
- 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
- get closer together.
- remain at a relatively fixed distance from one another.
- get farther apart.

- If a baseball being thrown goes from zero to 30 m/s in 0.1 s, what is its average acceleration?
- 3000 m/s/s
- 30 m/s/s
- 3 m/s/s
- 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
- 2500 m.
- 5000 m.
- 500 m.
- 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
- the same.
- more.
- 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
- opposite its velocity.
- directed upward.
- in the direction of motion.
- directed downward.

- What is the speed of an object at rest?
- 0.0 m/s
- 9.8 m/s
- 1.0 m/s
- 9.81 m/s

- Acceleration is
- displacement.
- velocity.
- the rate of change of displacement.
- the rate of change of velocity.

- When velocity is positive and acceleration is negative, what happens to the object's motion?
- The object slows down.
- Nothing happens to the object.
- The object speeds up.
- The object remains at rest.

What does the measurement of 4.0 m/s represent?- green
- red
- orange
- yellow

What does the measurement of 3.0 m/s^2 represent?- green
- red
- orange
- yellow

What does the measurement of 5.0 s represent?- green
- red
- orange
- yellow

In order to determine the final velocity after 5.0 s, which equation would be most useful?- blue
- indigo
- violet
- 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?- blue
- indigo
- violet
- 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?
- 6.00 m/s^2
- 150 m/s^2
- 35.0 m/s^2
- 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?
- 37.5 m
- 15.0 m
- 0.60 m
- 7.5 m

- Acceleration due to gravity is also called
- negative velocity.
- free-fall acceleration.
- displacement.
- instantaneous velocity.

Which equation would allow you to determine the rock's displacement after 2.00 s?- blue
- indigo
- violet
- white

What equation will allow you to determine the speed of the coin as it hits the ground?- blue
- indigo
- violet
- white

- Which would hit the ground first if dropped from the same height in a vacuum, a feather or a metal bolt?
- the feather
- the metal bolt
- They would hit the ground at the same time.
- They would be suspended in a vacuum.

- Which would fall with greater acceleration in a vacuum, a leaf or a stone?
- the leaf
- the stone
- They would accelerate at the same rate.
- There can be no acceleration in a vacuum.

- The inertia of an object is related to its ____.
- mass and speed
- mass and force
- mass only
- speed only

- Newton's first law is also known as the law of ____.
- The rate of change in the speed of an object is known as ____.
- velocity
- displacement
- acceleration
- equilibrium

- Acceleration of an object must be caused by a force that is ____.
- positive
- zero
- negative
- not zero

- The metric unit of force preferred by scientists is the ____.
- kilogram
- newton
- mima
- pound

What is the net force on the block?- 2.0 kg
- 10 N total
- 6.0 N to the right
- 9.8 kg • m / s^2 down

What is the acceleration of the block?- 3.0 m/sec^2 to the right
- 3.0 m/sec^2 to the left
- 5.0 m/sec^2 to the right
- 5.0 m/sec^2 to the left

Which equation below would most easily allow you to determine the acceleration of the block?- a = F / m
- t = x / v
- a = (vf - vi) / t
- x = vi(t) + 1/2a(t)2

- Terminal speed occurs when ____.
- the air resistance of an object increases
- an object starts to slow down due to air resistance
- the force of gravity is balanced by the air resistance of an object
- the acceleration due to gravity equals zero