Question

consider two scenarios. a ball of weight 10N rolls on the floor and a block for weight 10N slides on a table. In which case will the applied force required to just set the body in motion greater? why? ​

Answer 1

Answer:

Equal in both cases.

Explanation:

The force required to move both the bodies will be equal to the frictional force. Considering the coefficient of friction is equal in both cases, the force required to move them will also be equal.

Answer 2

The applied force required to set a body in motion is greater in case of sliding on table.

Explanation:

• Whenever a body is subjected to movement and is kept in contact with another surface, then there is friction involved.
• Force of friction is the force that opposes or tries to balance out the applied force.
• Frictional force acts opposite to the direction of applied force.
• It depends on the contact of the body and surface.
• If the contact area is more, then he friction is also more.
• While rolling, he ball is in minimum contact with the floor but while sliding, the block touches the table with maximum contact area.

Since rolling friction is less than sliding friction because of minimum contact area, so the applied force to bring the ball in motion is less when compared to the case of sliding block.