An object travels North at $1$ $ms^-1$ for $3$ $s$ and then travels South at $7$ $ms^-1$ for $5$ $s$ . What are the object's average speed and velocity?

Question

An object travels North at $1$ $ms^-1$ for $3$ $s$ and then travels South at $7$ $ms^-1$ for $5$ $s$ . What are the object's average speed and velocity?

1 Answer

Impact of this question

1544 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-05-23T09:14:43

The average speed is the total distance traveled divided by the total time: $"speed"="distance"/"time"=38/8=4.75$ $ms^-1$

The average velocity is the final displacement divided by the total time: $"velocity"="displacement"/"time"=32/8=4.0$ $ms^-1$

Explanation:

The average speed is the total distance traveled divided by the total time, while the average velocity is the final displacement divided by the total time.

The total time is $8$ $s$ .

The distance traveled in the first $3$ $s$ is $d=vt=1*3=3$ $m$ North.

The distance traveled in the next $5$ $s$ is $d=vt=7*5=35$ $m$ South.

The total distance is $35+3=38$ $m$ .

The total displacement is $35-3=32$ $m$ South.

Science

Math

Humanities

... and beyond

An object travels North at $1$ $ms^-1$ for $3$ $s$ and then travels South at $7$ $ms^-1$ for $5$ $s$ . What are the object's average speed and velocity?

1 Answer

Explanation:

Related questions

Impact of this question

Science

Math

Humanities

... and beyond

An object travels North at 11 ms^-1ms^-1 for 33 ss and then travels South at 77 ms^-1ms^-1 for 55 ss. What are the object's average speed and velocity?

1 Answer

Explanation:

Related questions

Impact of this question

An object travels North at $1$ $ms^-1$ for $3$ $s$ and then travels South at $7$ $ms^-1$ for $5$ $s$ . What are the object's average speed and velocity?