force and pressure

Which combination of forces produces a resultant force acting towards the right?

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2. Two forces F1 and F2 act on an object O in the directions shown

What is the direction of the resultant force?

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3. The diagram shows three forces acting on a block.

Which additional force will produce a resultant force of 3 N to the left?

A. 3 N to the left

B. 6 N to the right

C. 9 N to the left

D. 13 N to the right

4. An object has a mass of 15 kg. It is pushed horizontally by a force of 40 N. The frictional force is 10 N.

What is the acceleration of the object?

A. 0.50 m / s2

B. 1.5 m / s2

C. 2.0 m / s2

D. 2.7 m / s2

5. A water manometer is used to measure the pressure of a gas supply

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When it is attached to the gas supply, the water falls on the left side and rises on the right side.The difference in the levels of water on the two sides is now 20 cm. What is the pressure of the gas supply?

a. the pressure due to 10 cm depth of water

b. the pressure due to 20 cm depth of wate

c. the pressure due to 10 cm depth of water plus atmospheric pressure

d. the pressure due to 20 cm depth of water plus atmospheric pressure

6. What are three ways to change fluid pressure?

A. change density, weight or volume

B. change volume, mass or temperature

C. change temperature, weight or density

D. change weight, mass, or density

7. Which statement about the pressure in a column of liquid is correct?

A. It acts only vertically downwards.

B. It increases if the column width increases.

C. It increases with depth in the column

D. It is uniform throughout the column

8. A man stands on the ground. Which action will increase the pressure that the man exerts on the ground?

A. The man slowly bends his knees.

B. The man slowly lies down on the ground.

C. The man slowly raises his arms.

D. The man slowly raises one foot off the ground.

9. The diagram shows a simple mercury barometer. BAR

Which length is used to find the value of atmospheric pressure?

A. 12 cm

B. 74 cm

C. 86cm

D. 100cm

10. A car moves along a level road. The diagram shows all of the horizontal forces acting on the car.

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Which statement is correct?

A. The car is slowing down

B. The car is speeding up.

C. The car is moving at a constant speed.

D. The car is moving backwards

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