Position, acceleration, velocity

A car is moving on a highway with a speed of 10 m/s. 5 seconds later the car is moving at 40 m/s in the same direction. The car's acceleration is

+6m/s^2

A car is moving on a highway with a speed of 40 m/s. 5 seconds later the car is moving at 10 m/s in the same direction. The car's acceleration is

-6 m/s2

A car goes from 0 m/s to 10 m/s in 1 second, moving along the positive x-axis. What is its acceleration?

10 m/s2

A car starts from rest and reaches 20 m/s in 5 seconds. The average acceleration of the car is

4.0 m/s2

In one dimensional motion, the average velocity of an object that moves from one place to another and then back to the original place has which of the following properties? A. it is negative B. it is zero C. it can be positive, negative, or zero D. It is positive

C. It can be positive, negative or zero

What is the difference between distance and displacement?

Displacement is a vector and distance is a scalar

Who throws balls from the leaning Tower of Pisa?

Galileo Galilei

True or false: In the case of uniform accelerated motion, the graph of velocity versus time is a straight line angled to the time axis.

True

scalar quantity

a quantity that can be described by magnitude only and has no direction

vector quantity

a quantity that has both magnitude and direction

Ann travels 10 miles east and then travels 3 miles west. What is her displacement? a. 7 miles east b. 13 miles c. -7 miles east d. none of the above

a. 7 miles east

The slope of the velocity versus time graph is the

acceleration

Which graph shows an object moved with a constant velocity? a b c

b

A car is moving on a highway at a speed of 20 m/s. 5 seconds later the car is moving at 70 m/s in the same direction. The car's acceleration is a. -10 m/s2 b. 10 m/s2 c. 18 m/s2 d. -18 m/s2

b. 10 m/s2

Ann travels 10 miles east and then travels 3 miles west. What is her travel distance? a. 7 miles to east b. 13 miles c. 7 miles

b. 13 miles

Acceleration represents the

change in velocity with respect to time

Average speed is calculated by

dividing the distance traveled by the elapsed time

The basic unit of length in the metric system is

meters

A negative distance implies that an object is

on the negative side of the origin

Is speed a vector or scalar quantity?

scalar quantity because it has only magnitude and no direction

is Velocity is a vector or scalar quantity ?

vector quantity because it has both magnitude and direction

The slope of the distance traveled versus time graph is the

velocity