Two cars are moving in the same direction in parallel lanes along a highway. At some instant, car A is traveling faster than car B. Does that mean the acceleration of A is greater than that of B at that instant?

No. Acceleration only tells how an objects velocity is changing at some instant.

Yes. At any instant, a faster object always has a larger acceleration.

Can the instantanteous velocity of an object at an instant of time ever be greater or less than the average velocity over a time interval containing that instant?

It can be greater but not less than

It can be less but not greater than

It cannot be greater or less than

A juggler throws a bowling pin straight up in the air. After the pin leaves his hand and while it is in the air which statement is true?

The velocity of the pin is opposite its acceleration on the way up.

The velocity of the pin is always in the same direction as its acceleration.

The velocity of the pin is never in the same direction as its acceleration.

The acceleration of the pin is zero.

A racing car starts from rest and reaches a final speed (V) in a time (T). If the acceleration of the car is constant during this time, which of the following statements must be true?

The average speed of the car is V/2.

The acceleration of the car is V/T.

The velocity of the car remains constant.

A baseball is thrown from the outfield toward the catcher. When the ball reaches its highest point, which statement is true?

Its velocity is perpendicular to its acceleration.

Its velocity and acceleration are both zero.

Its velocity is not zero, but its acceleration is zero.

Its acceleration depends on the anfle at which the ball was thrown

A student throws a heavy red ball horizontally from a balcony of a tall building with an initial speed (Vo). At the same time a second student drops a ligther blue ball from the same balcony. Neglecting air resistance, which statement is true?

The balls reach the ground at the same instant.

The blue ball reaches the grounf first.

The red ball reaches the ground first.

Both balls hit the ground with the same speed.

A boat is heading due east at speed (V) when passengers onboard spot a dolphin swimming due north away from them, relative to their moving boat. Which of the following must be true of the dolphin's motion relative to a stationary observer floating in the water?

The dolphin is heading north of east at a speed greater than V.

The dolphin is heading south of east at a speed greater than V.

The dolphin is heading south of west at a speed less than V.

The dolphin is heading north of west at a speed less than V.

As a block slides down a frictionless incline, which of the follwoing is true?

The speed increases and the acceleration remains constant.

Both its speed and acceleration increase.

Its speed and acceleration remain constant.

Its speed increases and its acceleration decreases.

Both its speed and acceleration decrease.

A crate remains stationary after it has been palced on a ramo inclined at an angle with the horizontal. Which statement is true about the magnitude of the frictional force that acts on the crate?

It is equal to the component of the gravitational force acting down on the ramp.

It is larger than the weight of the crate.

It is at least equal to the weight of the crate.

It is greater than the componenet of the gravitational force acting down on the ramp.

A train has broken through the wall of the train station. During the collision, what can be said about the force exerted by the train on the wall?

It was the same in magnitude as the force exerted by the wall on the train.

It was larger than the force the wall could exert on the train.

It was less than the force exerted by the wall on the train.

The wall connot be said to "exert" a force.

If an object is in equilibrium, which of the following statements is not true?

The speed of the object remains constant.

The acceleration of the object is zero.

The net force acting on the object is zero.

Which fo the following statements are true?

An astronaut's mass is the same on the International Space Station as it is on Earth.

An astronaut's weight is the same on the Moon as on Earth.

Earth's gravity has no effect on astronauts inside the International Space Station.

An astronaut's mass is greater on Earth than on the Moon.

The driver of a car slams on her brakes to avoid colliding with a deer crossing the highway. What happens to the car's kinetic energy as it comes to rest?

The car's kinetic energy becomes zero.

The car's kinetic energy remains the same.

The car's potential energy decreases.

The car's kinetic energy increases.

Mark and David are loading identical Cement blocks onto David's pickup truck. Mark lifts his block straight up while David slides his block up a ramp on massless, frictionless rollers. Which statement is true?

They do the same amount of work.

Two stones, one with twice the mass of the other, are thrown straight up and rise to the same height (h). Compare their changes in gravitational potential energy.

The stone that is twice the mass has twice the change potential energy.

They rise to the same height so they have the same potential energy.

Physics 151 Exam 1 Review

Authored by Alissa Paterson

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MULTIPLE SELECT QUESTION

45 sec • 1 pt

Suppose two quantities, A and B, have different dimensions. Which of the following arithmetic operations could be physically meaningful?

A + B

A - B

A / B

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What SI Units compose a Newton?

kg * m / s^2

m / s

g * m / s^2

m / s^2

What SI Units compose a Joule?

N / s

kg * m^2 / s^2

N * s

kg * m / s

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

How many Significant Figures does 5160.0 the following have?

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

How many Significant Figures does 0.0130 have?

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

If the velocity of a particle is nonzero, can the particle's acceleration be zero?

True

False

If the velocity of a particle is zero, can the particle's acceleration be nonzero?

True

False

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Physics 151 Exam 1 Review

Suppose two quantities, A and B, have different dimensions. Which of the following arithmetic operations could be physically meaningful?

What SI Units compose a Newton?

What SI Units compose a Joule?

How many Significant Figures does 5160.0 the following have?

How many Significant Figures does 0.0130 have?

If the velocity of a particle is nonzero, can the particle's acceleration be zero?

If the velocity of a particle is zero, can the particle's acceleration be nonzero?

Two cars are moving in the same direction in parallel lanes along a highway. At some instant, car A is traveling faster than car B. Does that mean the acceleration of A is greater than that of B at that instant?

Can the instantanteous velocity of an object at an instant of time ever be greater or less than the average velocity over a time interval containing that instant?

A ball is thrown vertically upward. What are its velocity and acceleration when it reaches its maximum altitude and what is its acceleration right before hitting the ground? (Our positive Y is Upwards)

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