The Idea of Average Force
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- V2 > V1 > V3
- V2 > V3 > V1
- V1 > V2 > V3
- V3 > V1 > V2
- 37∘
- 53∘
- 60∘
- 30∘
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- 2 cm
- 103 cm
- 154 cm
- 183 cm
A hypothetical spring type object, exerts a force dependent on diplacement x, given by 4x3. What is the average force exterted by it while being displaced 2 units from its natural position?
2
4
8
16
If you performed a work "W" on an object. No external forces are acting on you and the object, while doing this work. Which of the following can be true
Work done by the object on you is "-W"
Work done on you is "-W"
Work done by the object is "-W"
Work done by you is "W"
The net force acting on the particle is
- 2As(1+sR)
- As(1+s2R2)1/2
- 2As(1+s2R2)1/2
- zero
Look at the activity listed here. Reason out whether or not work is done in the light of your understanding of the term work. A green plant is carrying out photosynthesis.
A hypothetical spring type object, exerts a force dependent on diplacement x, given by 4x3. What is the average force exterted by it while being displaced 2 units from its natural position?
2
4
8
16
The net force acting on the particle is
- 2As(1+sR)
- As(1+s2R2)1/2
- 2As(1+s2R2)1/2
- zero
- √2gr
- √2gr(1−sinθ)
- √2gr(1−cosθ)
- √2gr
- 1.2N
- 5.2N
- 3.2N
- 9.2N
A freight car is moving on smooth horizontal track without any external force. Rain is falling at the rate of u m/s at an angle θ with the vertical. Rain drops are collected in the car at the rate of μ kg/s. If initial mass of the car is m0 and velocity v0 then find its velocity after time it.
v=2ucosθ(m0m0+μt−1)+m0v0(m0+μt)
v=usinθ(m0m0+μt−1)+3m0v0(m0+μt)
v=usinθ(m0m0+μt−1)+m0v0(m0+μt)
Zero
A man rows a boat upstream but is at rest with respect to the shore. Is he doing any work?
![806133_97802bc735644225a3d8074705f344d3.jpg](https://search-static.byjusweb.com/question-images/toppr_ext/questions/806133_97802bc735644225a3d8074705f344d3.jpg)
- Define energy.
- State the mathematical expression of work.
- State two examples of when a force acting on a body does not do any work.
Read the given statement carefully and answer whether work is done or not done, and why?
A man pushing a wall.