Advertisements
Advertisements
Question
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
Advertisements
Solution
- An object's acceleration could be zero even when several forces are acting on it. This happens when all the forces cancel out each other, i.e., the net force acting on the object is zero.
- For a uniformly moving object, the net force acting on the object is zero.
- Hence, the acceleration of the object is zero. Hence, Soni is right.
- Then, according to the equation F = ma, the mass of the object.
- Acceleration = `F/m` (since F = 0) will also be zero.)
APPEARS IN
RELATED QUESTIONS
Name a common device where a gear train is used
When does a force perform work?
A water pump raises 50 litres of water through a height of 25 m in 5 s. Calculate the power of the pump required.
(Take g = 10 N kg-1 and density of water = 1000 kg m-3)
A bullet of mass 0.5 kg slows down from a speed of 5 m s-1 to that of 3 m s-1. Calculate the change in kinetic energy of the ball.
The work done on an object does not depend on the :
A girl weighing 400 N climbs a vertical ladder. If the value of g be 10 m s−2, the work by her after climbing 2 m will be :
Complete the following sentences:
Joule is the unit of .......
State the amount of work done by an object when it moves in a circular path for one complete rotation. Give a reason to justify your answer.
