Science

Question 1

1A boy runs 100 m in 10 s. Find his average speed.

Easy

A. 0.1 m/s B. 20 m/s C. 11 m/s D. 10 m/s

Question 2

2Friction can be reduced by

Easy

A. oiling (lubricating) moving parts B. roughening surfaces C. pressing surfaces harder D. adding sand

Question 3

3An athlete runs 100 m in 60 s. Her average speed is ___ m/s.

Easy

Your answer (fill in the blank)

Question 4

4Oil reduces friction in machines.

Easy

A. True B. False

Question 5

5A boy runs 240 m in 30 s. Find his average speed.

Easy

A. 38 m/s B. 16 m/s C. 8 m/s D. 0.125 m/s

Question 6

6Weight is measured in newtons.

Easy

A. True B. False

Question 7

7An athlete runs 300 m in 40 s. Her average speed is ___ m/s.

Easy

Your answer (fill in the blank)

Question 8

8The upward force on an object in water is

Medium

A. upthrust B. tension C. gravity D. friction

Question 9

9A force is

Easy

A. a type of energy only B. a measure of temperature C. the mass of an object D. a push or a pull

Question 10

10An athlete runs 1200 m in 50 s. Her average speed is ___ m/s.

Easy

Your answer (fill in the blank)