Physics 151 Exam 1 Review

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

• A + B

• AB

• A - B

• A / B

What SI Units compose a Newton?

• kg * m / s^2

• m / s

• g * m / s^2

• m / s^2

Tags

NGSS.HS-PS2-1

What SI Units compose a Joule?

• N / s

• kg * m^2 / s^2

• N * s

• kg * m / s

How many Significant Figures does 5160.0 the following have?

• 6
• 4
• 3
• 5

How many Significant Figures does 0.0130 have?

• 2
• 4
• 3
• 5

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

• True

• False

Tags

NGSS.HS-PS2-1

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

• True

• False

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?

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

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

• It can be greater but not less than

• It can be greater or less than

• It can be less but not greater than

• It cannot be greater or less than

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)

• V (max) = 0 m / s

  A (max) = 0 m / s^2

  A (final) = -9.8 m / s^2

• V (max) = 0

  A (max) = -9.8 m / s^2

  A (final) = -9.8 m / s^2

• V (max) = V (intial)

  A (max) = 0 m / s^2

  A (final) = -9.8 m / s^2

• V (max) = -9.8 m / s

  A (max) = 0 m / s^2

  A (final) = 0 m / s^2

Tags

NGSS.HS-PS2-1