Speed and Velocity

Front

What is the formula to calculate speed?

Back

S = d/t

Answer explanation

The correct formula to calculate speed (S) is S = d/t, where d is distance and t is time. This means speed is the distance traveled divided by the time taken.

Front

What is speed?

Back

how much distance is covered over a period of time

Answer explanation

Speed is defined as how much distance is covered over a period of time. This means it measures how quickly an object moves, making the correct choice the one that accurately describes this relationship.

Front

What is velocity?

Back

Speed in a specific direction

Answer explanation

Velocity is defined as speed in a specific direction, distinguishing it from mere quickness or speed, which do not account for direction. Thus, the correct choice is 'speed in a specific direction'.

Front

A runner races in the 100-meter dash. It takes her 10 seconds to finish. What is her average speed?

Back

10 m/s

Answer explanation

To find the average speed, divide the distance by the time. The runner covers 100 meters in 10 seconds. Average speed = 100 m / 10 s = 10 m/s. Thus, the correct answer is 10 m/s.

Front

Alan travels 100 km in 5 hrs. Find his average speed in km/h.

Back

20 km/hr

Answer explanation

To find average speed, use the formula: speed = distance/time. Here, distance = 100 km and time = 5 hrs. So, average speed = 100 km / 5 hrs = 20 km/hr. Thus, the correct answer is 20 km/hr.

Front

What two measurements are necessary for calculating speed?

Back

Distance and time

Answer explanation

To calculate speed, you need to know how far an object has traveled (distance) and how long it took to travel that distance (time). Therefore, the correct measurements are distance and time.

Front

Velocity is both ____ and _____.

Back

speed, direction

Answer explanation

Velocity is defined as the rate of change of position and includes both speed (how fast an object is moving) and direction (the path along which it moves). Therefore, the correct answer is speed and direction.

Front

65 mi/hr South is an example of...

Back

Velocity

Answer explanation

65mi/hr South is an example of velocity because it includes both speed (65mi/hr) and direction (South). Velocity is defined as speed with a specified direction, distinguishing it from speed alone.

Front

Km (kilometers) is a unit for...

Back

Distance

Answer explanation

Km (kilometers) is a unit of measurement specifically used to quantify distance. It is not used for speed, time, or direction, making 'Distance' the correct answer.

Front

An object is _____ if its position changes relative to another object.

Back

in motion

Answer explanation

An object is 'in motion' when its position changes relative to another object. This indicates that it is moving, distinguishing it from being stationary or at rest.