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- 1. Multiple ChoiceWhat is the formula for density?density = mass x volumedensity = mass / volumedensity = mass + volumedensity = mass - volume
- 2. Multiple ChoiceFrank has an eraser. It has a mass of 4g, and a volume of 2cm3. What is its density?8 g/cm32 g/cm31/2 g/cm324 g/cm3
- 3. Multiple Choice
What is the volume of Object X?10.0 cm315.0 cm320.0 cm325.0 cm3 - 4. Multiple Choice
Calculate the density of an object. To do this, we measure its mass onsome scales, obtaining a value of 50,2g. We also measure its volume in a graduated cylinder. The water initially has a volume of 22cm3. When we put the object in the water, the volume rises to 34cm3.
4,18 g/cm3
0,24 g/cm3
1,47 g/cm3
2,28 g/cm3
- 5. Multiple ChoiceWhat pressure does a 4000N horse exert on the ground if each foot is 10cm2?40 N/cm2100 N/cm2400 N/cm210 N/cm2
- 6. Multiple Choice
When a fluid fills a closed container, it exerts pressure
only on the bottom of the container
only on the sides of the container
only on particles within the fluid
everywhere inside the container
- 7. Multiple Choice
Fluids exert pressure because they
contain force particles
are confined to small area
have constantly moving particles
all of these are correct
- 8. Multiple Choice
A submarine is found 20 meters below the surface of the sea. The density of sea water is 1020 kg m-3 and g = 10 m/s2 What is the pressure due to the sea water acting on the submarine?
20.4 Pa
2.04 x 103 Pa
2.04 x 102 Pa
2.04 x 105 Pa
2.04 x 10-2 Pa
- 9. Multiple ChoiceWhich of the following graphs shows the correct relationship between water pressure, p and depth, h of the water?ABCD
- 10. Multiple Choice
What is a hydraulic system?
A system that uses a liquid under pressure to transmit a force to do work.
A system that uses a gas under pressure to transmit a force to do work
Pascal's law.
It uses water to push an object.
- 11. Multiple ChoiceWhat is the force up on the mailbox?1210 N8000 N7744 N5655 N
- 12. Multiple ChoiceWhat principle is this hydraulic press showing?Archimedes' PrincipleBernoulli's PrinciplePascal's PrinciplePrinciple Testa
- 13. Multiple Choice
Which lever configuration is most similar to the hydraulic system pictured?
- 14. Multiple ChoiceWhat is the anticlockwise moment acting on this crane?80,000Nm100,000Nm120,000Nm140,000Nm
- 15. Multiple Choice
Two masses of mass 10.0 and 6.0 kg are hung from massless strings at the end of a light rod. The rod is virtually weightless. A pivot (fulcrum) is placed off center and the system is free to rotate. If the 6.0 kg mass is 4.0 m away from the pivot, how far away is the 10.0 kg mass if the system is not rotating?
0.42 m
2.4 m
4.8 m
4.2 m
- 16. Multiple Choice3. Which type of lever is this?First Class LeverSecond Class LeverThird Class Lever
- 17. Multiple Choice
A boy of weight 600N sits on the see-saw as shown at a distance of 1.5m from the pivot. What is the force F required at the other end to balance the see-saw?
450 N
350 N
4.5 N
200 N
- 18. Multiple Choice
James weighs 200 N and sits 1 m from the pivot. Jane weighs 100 N. How far from the pivot must Jane be to balance the beam?
0.5 m
1 m
2 m
4 m
- 19. Multiple Choice
A force exerts a moment of 2 Nm. What is the distance of the force from the pivot?
1 m
0.5 m
0.2 m
0.25 m
- 20. Multiple Choice
To calculate a turning effect of a spanner the force is multiplied by the length of the spanner
always - if the length of the spanner is equal to the distance from the fulcrum to the applied force
never - the length must be equal to the distance from the pivot to the fulcrum
if the length of the spanner is equal to the parallel distance from the pivot to the applied force
if the length of the spanner is equal to the perpendicular distance from the pivot to the applied force
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