# Worksheet: Average Speed

In this worksheet, we will practice calculating the average speed of a particle by dividing the total distance of a journey by its total time.

Q1:

The table shows the distance covered by a runner at certain times. How far did the runner travel in the first 86 seconds?

 Time in Seconds Distance in Meters 0 20 40 60 80 100 0 50 100 150 200 250

Q2:

A body, moving in a straight line, travelled 91 m at 8 m/s. Following this, it travelled at 11 m/s in the same direction for a further 13 seconds. Find the average velocity during the whole trip.

Q3:

A cyclist traveled 36.5 km from point to point at 36.5 km/h and then traveled a further 22 km in the same direction at 22 km/h. Given that is a unit vector in direction, determine the cyclist’s average speed and average velocity during the whole trip.

• A ,
• B ,
• C ,
• D ,

Q4:

Given that the table shows the relation between the distance a runner can run and the time it would take him to run that distance, determine how long it would take him to cover a distance of 336 metres.

 Time in Seconds Distance in Meters 0 2 4 6 8 10 0 8 16 24 32 40

Q5:

The graph represents the distance traveled by a speed boat. Use the graph to determine, in miles per hour, the rate of change in distance.

Q6:

A moving particle reached a point after 2 seconds and another point after 10 seconds. Find the magnitude of the average velocity of the particle and the direction of the average velocity .

• A length units/second,
• B length units/second,
• C length units/second,
• D length units/second,
• E length units/second,

Q7:

The figure below shows the relation between time and the distance from a fixed point of a cyclist who is moving in a straight line. Using this information, find the magnitude of the average velocity vector of the cyclist.

• A11 m/s
• B10 m/s
• C5 m/s
• D3 m/s

Q8:

A person drove a car for 723 m on a straight road with a velocity of 9 km/h. He then continued for the same distance in the same direction, but with a velocity of 6 km/h. Find the magnitude of the average velocity during the whole trip.

Q9:

A car, starting from rest, began moving in a straight line from a fixed point. Its velocity after time seconds is given by . Find its average velocity during the time interval between and .

• A m/s
• B m/s
• C m/s
• D m/s

Q10:

The graph shows the distance, in kilometers, a motorcycle traveled from a certain city to another and back again and the time of the trip, in hours. Find the average speed of the motorcycle on its journey from the first city to the second.

Q11:

A cyclist traveled 10.5 km on a straight road from point toward point at 18 km/h. Then, he turned around from point and headed in the opposite direction and covered 21 km traveling at 28 km/h. Find his average speed, , and the average velocity, , expressing them in terms of , the unit vector in the direction he started traveling.

• A ,
• B ,
• C ,
• D ,

Q12:

Using the displacement-time graph, find the average speed of the body.

• A20 m/s
• B m/s
• C m/s
• D m/s
• E m/s

Q13:

A body started moving in a straight line. At time seconds, its velocity is given by Find the body’s average speed during the first 13.5 s of motion.

Q14:

A body moves along a straight line. At time seconds, its velocity is given by Determine the body’s average velocity and its average speed in the time interval .

• Aaverage velocity , average speed
• Baverage velocity , average speed
• Caverage velocity , average speed
• Daverage velocity , average speed
• Eaverage velocity , average speed

Q15:

A moving particle passed through two points and at the 6th and 11th seconds, respectively. Find the magnitude of the average velocity of the particle during this period of time and its direction to the nearest minute.

• A length units/second,
• B length units/second,
• C length units/second,
• D length units/second,
• E length units/second,

Q16:

The function gives a projectile’s displacement in meters after minutes. Find the average velocity of the projectile on the interval .

Q17:

At the start of a trip, the odometer on a car read 21,395. At the end of the trip, 13.5 hours later, the odometer read 22,125. Assume the scale on the odometer is in miles. What is the average speed the car traveled during this trip in miles per hour? Give your answer correct to one decimal place.

Q18:

A diesel ship leaves on a long voyage, heading in a straight line away from shore. When it is 180 miles from shore, a seaplane, whose speed is 10 times that of the ship, is sent to deliver mail, starting from the same departure point as the ship and following the same route. How far from shore does the seaplane catch up with the ship?

Q19:

The given graph describes two straight paths of movement of two cars, and , where the path of is in green and the path of in blue. Both cars move from two different villages, and each car moves from a village heading toward the other. Determine the time taken by car to reach its destination.

Q20:

The figure below represents the paths of two cars: car is represented by the green line, and car is represented by the blue one. Car is moving from the capital city to a village, and car is traveling from the village to the capital city. Given that car started moving at am, when will it reach the capital city?

• Aam
• Bam
• Cam
• Dam

Q21:

The graph represents the paths of two cars and : in green and in blue, where car is moving from village to village , and car from to . How long does it take for the two cars to meet?

Q22:

A cyclist traveled 45.5 km from point to point at 52 km/h and then traveled a further 38.5 km in the same direction at 44 km/h. Given that is a unit vector in direction, determine the cyclist’s average speed and average velocity during the whole trip.

• A ,
• B ,
• C ,
• D ,

Q23:

A cyclist traveled east at 15 m/s for 15 seconds, and then he stopped to rest for 10 seconds. Then, he moved west at 2 m/s for 75 seconds. Find the cyclist’s average speed for the whole trip.

Q24:

Near the surface of the moon, the distance that an object falls is a function of time. It is given by , where is in seconds and is in feet. An object is dropped and falls for at least 3 seconds. Calculate the average velocity of the object from to .