Moments I - Year 9
Quiz
•
Physics
•
9th Grade
•
Easy
Daniel Sunday Udoh
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10 questions
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1.
OPEN ENDED QUESTION
1 min • 1 pt
Calculate the moment in the figure______________
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Answer explanation
To calculate the moment, use the formula: Moment = Force x Distance. If the moment on the anticlockwise is 0.35 X F, then the moment on the clockwise will be:
0.5 X 5N = 2.4 N
The unknown force can be calculated thus:
F = 2.5 N/0.35 N = If applied to the top, it creates a clockwise moment.
7.14 N
2.
OPEN ENDED QUESTION
1 min • 1 pt
Tehilla and Giovani are working on a project where they need to calculate the turning force (in Nm) for various objects they are using in their science experiment. They must put these objects in order, from the lowest to the highest turning force. Assume the gravitational field strength is 10N/kg.
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Answer explanation
To calculate the turning force (torque), use the formula: Torque = Force x Distance. With a gravitational field strength of 10N/kg, order the objects based on their weight and distance from the pivot to find the correct sequence.
3.
OPEN ENDED QUESTION
1 min • 1 pt
A spanner is used to undo a nut. A force of 25 N is applied to the end of the spanner, which is 10 cm away from the centre of the nut. Calculate the moment when the spanner is horizontal.
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Answer explanation
The moment is calculated using the formula: Moment = Force x Distance. Here, Moment = 25 N x 0.1 m = 2.5 Nm. Thus, the moment when the spanner is horizontal is 2.5 Nm.
4.
OPEN ENDED QUESTION
1 min • 1 pt
Consider the question above, the clockwise moment (CM) = 3x 4 = 12. Anti-clockwise moment (ACM) = 2 x A. Since clockwise moment must be equal to anti clockwise moment, 3x 4 = 2 x A.
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Answer explanation
To find A, set the clockwise moment (12) equal to the anti-clockwise moment (2A). Thus, 12 = 2A. Solving for A gives A = 6. This shows the moments are balanced, confirming the calculations are correct.
5.
OPEN ENDED QUESTION
1 min • 1 pt
A weight of 16N was placed to the right of a seesaw, 3m from the pivot. Another weight of 8N was placed to the left side of the pivot and the seesaw balanced. Calculate the distance of the 8N weight from the pivot.
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Answer explanation
To balance the seesaw, the moments must be equal. Moment from 16N = 16N * 3m = 48Nm. For 8N weight, let distance be x: 8N * x = 48Nm. Thus, x = 48Nm / 8N = 6m. The 8N weight is 6m from the pivot.
6.
OPEN ENDED QUESTION
1 min • 1 pt
Demilade explains that the S.I unit of momemt is______________? Can you write the S,I Unit below?
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Answer explanation
The answer is Newton-meter
7.
OPEN ENDED QUESTION
1 min • 1 pt
Tehilla and Maya are working on a physics project together. They need to calculate the value of the force F acting on an object. Can you help them with this calculation?
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Answer explanation
To calculate the force F, use Newton's second law: F = m * a, where m is mass and a is acceleration. Ensure you have the correct values for mass and acceleration to find the force acting on the object.
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