A seesaw with a mass of 5kg has one block of mass 10kg two metres to the left of fulcrum and another block 0.5m to the right of the fulcrum. As shown below. If seesaw is in equilibrium, find the force exerted by the fulcrum.
Correct answer: C. 550 N
- A. 15 N
- B. 40 N
- C. 550 N
- D. 500 N
Explanation
Option C is correct because the combined gravitational forces on the seesaw and the blocks must equal the force exerted by the fulcrum to maintain equilibrium. The gravitational force on the seesaw itself (5 kg) combines with the gravitational forces on the two blocks (10 kg and the unknown mass on the right side). The correct calculation shows that 550 N is required for balance, considering the distance of each mass from the fulcrum. Options A, B, and D do not account for these factors accurately, leading to incorrect values.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
Practise Force and Motion
1,416 free Force and Motion MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Force and Motion questions
A baseball of mass 0.25 kg is thrown in the air with an initial speed of 30m/s but because of air resistance, the ball returns to the ground with a speed of 27m/s. Find the work done by air resistance.
A ball is thrown vertically up into the air from a window ledge 30 meters above the ground with an initial velocity of 10m/s. Find velocity of ball after 2 seconds.
Type of friction that exists between a stationary object and the surface upon which it rests is called _
Which of the following quantities is not a vector?
A 30 kg child sits on a seesaw at a distance of 2m from the fulcrum. Where must the child's parent sit to balance the seesaw if the parent has a mass of 90kg
Which of the following is a conservative force?