Chapter 1 Review

If you know a cheetah runs 290m in 10 seconds, can you calculate speed?

• Yes, by dividing distance by time.

• No, it's not possible.

• Only with a calculator.

• Only if the distance is known.

On a Distance-Time graph, how can you tell when an object is slowing down?

• By observing the decrease in speed over time.

• No, it is not possible to determine if an object is slowing down.

• Only if the object is moving in a straight line.

• Only if the object is accelerating.

Can you tell when an object is speeding up?

• Only if the object is moving in a straight line.

• No, it's impossible to determine.

• By observing the increase in velocity over time..

• Only if the object is moving in a circular path.

How can you tell when an object is moving away?

• It’s impossible to tell.

• Only if the object is visible.

• Only if the object is making a sound.

• By observing the distance away from or close to the Zero point.

You can tell when an object has a constant speed by:

• observing that the object covers unequal distances in equal intervals of time.

• noticing that the object's speedometer reading is fluctuating.

• Observing no acceleration occuring.

• realizing that the object is accelerating.

If Harry rides his broomstick for 30 minutes at a velocity of 20m/s, then increases to 30 m/s for 10 minutes, can you calculate acceleration?

• Yes, by using the formula a = (v_f - v_i) / t

• No, it's not possible to calculate acceleration

• Only if the mass is known

• Only if the force is known

___________ is a measure of the change in velocity during a period of time.

• Acceleration
• Momentum
• Speed
• Velocity

______________ is a starting point you use to describe the motion or position of an object.

• Reference point
• Starting position
• Motion vector
• Static point

____________ is an object’s distance and direction from a reference point.

• Acceleration

• Velocity
• Position

• Momentum

__________ is the length of a path; __________ is the difference between the initial (starting) position and the final position of an object that has moved.

• Motion; reference point

• Distance; displacement.

• Constant; variable

• Displacement; distance.