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A smooth wooden block is placed on a smooth wooden tabletop. You find that you must exert a force of 22.0 N to keep this 7.00 kg block moving at a constant
velocity of 4.00 m/s. What is the gravitational force acting on the wooden block?

A.) 7.00 N

B.) 68.7 N

C.) 22.0 N

D.) 78.5 N

Sagot :

Lucicidn

Answer:

B . 68.7 N

Explanation:

Given in the question that;

Force = 22 N

Mass = 7.0 kg

Velocity = 4.0 m/s

Gravitational force is the weight of wooden block , calculated as mass times acceleration due to gravity.

F= m* a

F= 7 * 9.81

F= 68.67 N

F= 68.7 N

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