Motions in One Dimension

Displacement

100

Is displacement a vector or scalar quantity?

Displacement is a vector quantity.

200

If you walk 10 meters north, what is your displacement?

The displacement is 10 m north.

300

What is the formula of displacement?

x = x_f - x_i

400

What is the formula for Displacement with Constant Acceleration?

x = 1/2(v_i+v_f)t

500

Is Displacement..

a. Zero

b. Positive 

c. Negative

d. All of the above 

d. All of the above

Velocity

100

Is velocity a vector or scalar quantity?

Velocity is a vector quantity.

200

If an object moves 20 meters north in 5 seconds, what is the average velocity?

The average velocity is 4 m/s south.

300

What is the formula for Average Velocity?

v_avg = x/t = x_f-xi/t_f-t_i

400

What is the formula for Velocity with Constant Acceleration?

v_{f =} v_i + at

500

Consider a car trip to a friend's house 370 km to the west (negative direction) along a straight highway. If you left your house at 10 A.M. and arrived at your friend's house at 3 P.M., what is your average velocity?

74 km/h west

Acceleration

100

Is acceleration a vector or scalar quantity?

Acceleration is a vector quantity.

200

What is an example of Acceleration?

a. A car increasing on a highway

b. A ball slowing down due to friction

c. A roller coaster changed in direction at high speed

d. All of the above

d. All of the above

300

What is the formula for Average Acceleration?

a_avg = v/t = v_f-v_i/t_f-t_i

400

A car traveling at 7.0 m/s accelerates uniformly at 2.5 m/s² to reach a speed of 12.0 m/s. How long does it take for this acceleration to occur?

2 seconds.

500

If v_i=positive and a=negative, what is the motion?

The motion is slowing down. 

Free fall

100

How much does its velocity increase every second?

9.8 m/s every second

200

True or False? All objects in free fall near Earth's surface accelerate at the same rate, regardless of mass.

True.

300

Where do objects start at if they were dropped from rest and speed up?

0 m/s

400

Imagine you are in a perfect vacuum. If you drop a bowling ball and a feather from the same height at the same time, which one will hit the ground first?

a. The feather floats due to lack of air.

b. The feather hits the ground first.

c. They both hit the ground at the same time.

d. The bowling ball hits the ground first.

c. They both hit the ground at the same time. 

500

What famous experiment is connect to falling objects?

Galileo's experiment.

Vector vs Scalar

100

Which is an example of a vector quantity?

a. Force

b. Mass

c. Volume

d. Speed

a. Force

200

Which is an example of a scalar quantity?

a. Weight

b. Velocity

c. Density

d. Acceleration

c. Density

300

What is scalar quantity represented by?

It is represented by a number and unit.

400

What is vector quantity represented by?

It is represented by arrows in diagrams.

500

Scalar quantities describe how much and vector quantities also describe how much and?

It describes how much and in what direction.