1D Motion

In physics speed is a scalar quantity

• true

• false

Tags

NGSS.HS-PS4-1

speed is

• a measure of how fast something is moving

• always measured in terms of a unit of distance divided by a unti of time

• the distance covered per unit of time

• all of the above

• none of the above

Tags

NGSS.MS-PS3-1

When a car's acceleration is negative, what is happening to the car's motion?

• the car slows down

• the car speeds up

• the car travels at constant speed

• the car remains at rest

Tags

NGSS.MS-PS3-5

Acceleration is defined as

• the rate of change of distance

• the rate of change of displacement

• the rate of change of time

• the rate of change of velocity

If a battery-powered car can accelerate at 14.0 m/s², how fast will it be going after 3.2 s if it started from 0.0 m/s?

• 4.375 m/s

• 10.8 m/s

• 14.0 m/s

• 44.8 m/s

Tags

NGSS.MS-PS2-2

A train is moving at a velocity of 15 m/s East. A passenger at the back of a train throws a baseball with a speed of 15 m/s West. What is the velocity of the baseball relative to the ground? (In other words: how fast does a person on the ground see the ball move?)

• 30 m/s East

• 15 m/s West

• 0 m/s

• 30 m/s West

Tags

NGSS.HS-PS2-2

An object that is traveling east at a constant rate has

• velocity, but neither acceleration nor speed.

• speed, but neither velocity nor acceleration.

• speed and velocity, but no acceleration.

• acceleration and speed, but no velocity.

Is this a scalar quantity or a vector quantity?
A deer running 15 meters per second due west

• Scalar

• Vector

Vector quantities need both a magnitude and a _____.

• distance

• displacement

• direction

• velocity

Which one of the following situations represents acceleration?

• increasing speed

• decreasing speed

• changing directions

• all options

• none