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WorksheetsMomentum and Moments - iGCSE triple content
Total questions: 15
Worksheet time: 35mins
A moment is best described as...
a force acting parallel to a distance from a pivot.
a force acting over a distance.
the rotation of an object.
a force acting at a perpendicular distance from a pivot.
Two children, A and B, are sitting on a see-saw, as shown in the figure below.
The see-saw is balanced.
Calculate the moment of child B about the pivot of the see-saw in N m. (just write the value, no units needed)
(a)
Two children, A and B, are sitting on a see-saw, as shown in the figure below.
The see-saw is balanced.
Calculate the weight of child A if they are sitting 80 cm from the pivot of the see-saw in N. (just write the value, no units needed)
(a)
A camera boom is used at a television studio to allow filming from different positions.
Figure 1 shows the arm of the boom in three different positions.
In which position will the weight of the camera cause the largest moment about the pivot?
A
B
C
They are all the same moment.
A camera boom is used at a television studio to allow filming from different positions.
Complete the sentence.
When the moment caused by the weight of the camera increases, the moment caused by the counterweight ____________________ .
decreases
does not change
increases
They are all the same moment.
The camera has a mass of 5.0 kg
gravitational field strength = 9.8 N/kg
Calculate the weight of the camera. write the unit symbol with your answer.
(a)
Figure 2 shows the 5 kg camera boom in a new position, D.
Calculate the moment about the pivot caused by the weight of the camera when the arm of the boom is in position D in Nm. (no unit needed)
(a)
Calculate the pulling force that is needed in the steel cable to keep the jib horizontal. (No unit needed)
(a)
The diagram shows an air-driven toy.
When the electric motor is switched on the fan rotates.
The fan pushes air backwards making the toy move forwards.
The toy has a mass of 0.15 kg and moves forward with a velocity of 0.08 m/s.
How is the momentum of the toy calculated?
0.15 + 0.08 = 0.230
0.15 ÷ 0.08 = 1.875
0.15 × 0.08 = 0.012
What are the unit of momentum?
kg m/s
m/s2
kg/m/s
The fan pushes air backwards making the toy move forwards.
Use the correct answer to complete the sentence.
The momentum of the air backwards is _______________ the momentum of the toy forwards.
less than
equal to
more than
The diagram shows three vehicles travelling along a straight road at 14 m/s.
Which vehicle has the greatest momentum?
Motorcycle
Lorry
Van
The diagram shows three vehicles travelling along a straight road at 14 m/s.
Calculate the momentum of the motorbike when it travels at 14 m/s. (no unit needed)
(a)
If the Van stops suddenly (it's speed is now 0 m/s) and the lorry hits it travelling at 14 m/s. They join together after the collision, how fast we they both be travelling? (answer to 2 significant figures, no unit needed)
(a)
The law of momentum says that, momentum is always (a) (one word)
