Question
To move an object on a horizontal table, one needs to apply:
The correct answer is
unbalanced force
An object in motion requires an unbalanced force to overcome inertia and initiate movement. Balanced forces cancel each other out, preventing motion. Therefore, the correct answer is 'unbalanced force'.
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Important Questions from Work and Kinetic Energy
A car of mass m accelerates uniformly from rest under a constant force F. After traveling a distance d, what is the kinetic energy of the car?
If ‘A’ stands for ‘−’, ‘B’ stands for ‘×’, ‘C’ stands for ‘+’ and ‘D’ stands for ‘+’, what will come in place of the question mark ‘?’ in the following equation?
23 D 18 C 3 B 5 A 17 = ?
- Two objects A and B of different masses have same momentum, which one will have more kinetic energy, if mass of A is more than the mass of B?
- A body of mass 10 kg is thrown vertically upwards with a velocity of 10 m/s. How much potential energy will be possessed by the body when it reaches the maximum height? (Take $g = 10 \text{ m/s}^2$)
- A car has a mass of 120 kg. How much work must be done to raise its speed from 72 km/h to 108 km/h?
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