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- @A 3N weight is hung from a spring, which makes it stretch 10cm. If 6N is hung from the same spring instead of 3N, it will stretch by:
- #for1
- 20cm
- 5cm
- 10cm
-
- @A 5 N weight makes a spring stretch by 25cm. To make the spring stretch by just 5cm the weight you would use would be:
- #for1
- 1 Newton
- 25 Newtons
- 5 Newtons
-
- @Turning forces depend on:
- The force and distance from the pivot
- The pull of gravity
- The distance from the pivot only
-
- @The centre of mass of a long straight ruler is:
- In the middle
- At each end
- Half way between the middle and one of the ends
-
- @The units of turning forces are:
- Nm
- m
- Pa
-
- @A racing car is stable because:
- It has a low centre of gravity
- It is very light
- It is shaped to go through the air easily
-
- @The turning effect of a force is called:
- Moment
- Pivot
- Equilibrium
-
- @When a mass is suspended from a spring the spring stretches. Where does this stretching force come from?
- #for1
- Gravity
- The object the spring is held up by
- The spring
-
- @When forces balance exactly this is called:
- Equilibrium
- Reaction
- Moments
-
- @Which ONE of the following would NOT help to make an object more stable?
- Putting extra mass on the top of it
- Making the centre of gravity lower
- Making the base wider
-
- @For equilibrium to occur in turning forces which one of the following MUST be true?
- The clockwise moment must equal the anticlockwise moment
- The clockwise moment must be bigger than the anticlockwise moment
- The anticlockwise moment must be just grater than the clockwise
-
- @When a mass, suspended from a spring, is not moving it is:
- In equilibrium
- Not being pulled by gravity
- Weightless
-
- @Forces are measured in:
- Newtons
- Kilograms
- Joules
-
- @Which one of the following is correct?
- Mass never changes, but weight can vary
- Mass and weight never change
- Mass changes, but weight always remains the same
-
- @The pull of gravity on a mass is called:
- Weight
- Acceleration
- Inertia
-
- @Mass is measured in:
- Kilograms
- Newtons
- Cubic centimetres
-
- @On the planet Jupiter (much larger then the Earth) your mass would be:
- just the same
- much more
- slightly less
-
- @On Earth the gravitational field strength is 10 N/Kg which means:
- Each Kg has a weight of 10 Newtons
- One Newtons weighs 10 Kg
- One Kg has a mass of 10 Newtons
-
- @When you suspend a mass on a spring it stretches so far and stops. Gravity pulls the mass down. What pulls it up?
- Force from the spring
- Air resistance
- The objects weight
-
- @Which one of these statements is correct?
- A force is a vector
- Forces are scalars
- Forces can be either scalars or vectors
-
- @Two forces are of equal size, but they act in opposite directions. We say the forces are in:
- Equilibrium
- Action
- Motion
-
- @A trolley has two forces acting on it. If f1=12 N and f2=14 N then the trolley:
- #for4
- Moves to the left with a 2 N force acting on it
- Moves to the right with a 26 N force acting on it
- Moves to the right with a 2 N force acting on it
-
- @The trolley shown in the diagram is not moving. From this we can say that
- #for4
- The two forces are exactly the same size
- Both forces must be zero
- The two forces must be different
-
- @If the weight M=4 N and the weight the forcemeter G is 1 N then the reading on the forcemeter H will be:
- #for3
- 4 N
- 5 N
- 3 N
-
- @Up to the elastic limit, putting extra masses on a spring in equal steps causes the spring to stretch by:
- equal amounts
- amounts that get larger as you approach the limit
- gradually decreasing amounts
-
- @Weight is different to mass because:
- it changes but mass doesn't
- it remains constant no matter where you are
- it does not depend on gravity
-
- @A field is a region where:
- an object 'feels' a force
- forces cancel each other out
- an object will not be accelerated
-
- @As you get further away from the Earth, the force of gravity:
- gets weaker
- remains the same
- increases
-
- @Someone inside a spacecraft, orbiting the Earth:
- is in constant free fall
- is weightless
- has no mass
-
- @Mass:
- depends on the atoms the object is made from
- a force, dependent on gravity
- can be measured in Newtons