# Lesson Worksheet: Quantities and Units in Mechanics Mathematics

In this worksheet, we will practice identifying fundamental and derived quantities used in mechanics, such as length, time and velocity, and identifying their units and unit conversions.

**Q6: **

The force applied on an object is calculated using the formula ,
where is the acceleration of the object
(measured in meters per second squared, or
m/s^{2}),
and is its mass (measured in
kilograms, or kg).
The force is then measured in newtons.
Which of the following is the expression of newtons
in terms of the base units
kilograms,
meters,
and seconds?

- A(kg⋅m/s)
^{2} - Bkg⋅s
^{2}/m - Ckg⋅m/s
^{2} - Dkg⋅m
^{2}/s^{2} - Ekg⋅m/s

**Q8: **

If a train is moving at 315 km/h and a car is moving at 750 m/min, which of them has a speed greater than 50 m/s?

- Athe train
- Bboth of them
- Cthe car
- Dnone of them

**Q9: **

A body is moving with an average velocity of 10 km/h. What is the distance traveled in meters if the body moves for 10 s? Write your answer approximated to two decimal places.