WorksheetsUnit Test 2 Revision 2 April 2021
Total questions: 15
Worksheet time: 4hrs 31mins
1. TRUE or FALSE? Looking at this picture of trees moved by wind’s push force? We, can actually and physically see the force. Could this be true? Explain why.
TRUE
We can see the force, we can see the movement of object (like these trees moving) pulled by force. Plus we also can feel the force.
FALSE
We cannot see the force, but we can see the movement of object (like these trees moving) pushed by force. Plus we also can feel the force.
TRUE or FALSE? Force Meter’s unit of measurement “Newton” was used in honour of Sir Isaac Newton; the scientist who discovered the principle of force and the laws of motion. Could this be true? Explain why?
TRUE
He discovered gravity when he suddenly saw an apple fell from a tree one day. He said that all objects are constantly pulled to the centre of the earth. Thus, it is called Weight in Newtons.
FALSE
He discovered electricity when he suddenly saw an apple fell from a tree one day. He said that all objects are constantly pushed to the centre of the earth. Thus, it is called Mass in Newtons.
3. TRUE or FALSE? A football player changes the direction of a ball by angling his foot towards the goal box. Could this be true? Explain why.
FALSE
In order to reach the goal box, a player needs to keep straight the balls direction by pressing his foot towards the goal box.
TRUE
In order to reach the goal box, a player needs to change the balls direction by angling his foot towards the goal box.
4. TRUE or FALSE? Squash force is different from squeeze force. Could this be true? Explain why.
TRUE
A squash is a flat push force. While squeeze is a force when you press something firmly from both sides at the same time.
FALSE
A squash is a circular twist force. While squeeze is a force when you pull something firmly from both sides at the same time.
5. TRUE or FALSE? Air Resistance is a type of friction. Can this be true? Explain why.
FALSE
It is a pulling force that pushes object downward slowing down the drag or pull of gravity.
TRUE
It is a contact force that pushes object upward slowing down the drag or pull of gravity.
6. Towards which direction does the water move in the picture? What is gravity? Select the correct conclusion.
Conclusion:
I found out that the water or liquid is moving upward towards the pull of gravity.
Gravity is a man-made force that pulls all objects towards the centre of the earth.
Conclusion:
I found out that the water or liquid is moving downwards towards the pull of gravity.
Gravity is a natural force that pulls all objects towards the centre of the earth.
7. What are the 3 natural forces? Water, wind and __________.
a. push
b. pull
c. twist
d. gravity
8. What are the 3 man-made forces? Push, pull and _________.
a. wind
b. water
c. twist
d. gravity
9. What kind of natural force makes the hydro-turbines at Niagara Falls generate electricity?
wind force
water force
gravity
twist force
10. What kind of natural force makes EWA Bahrain's Wind Turbines generate electricity?
twist force
gravity
water force
wind force
11. How much is the weight of a 4 kg object on the moon? 4 N or 40 N?
(a)
12. How much is the weight of a 2 kg object on earth? 2 N or 20 N?
(a)
13. What is the mass of a 2 kg object on the moon? 20 kg or 2 kg?
(a)
14. What is this rubbing force of two surfaces that slows things down?
(a)
15. How much friction would you need when you will skate on an ice skating rink? strong or less?
(a)
