A20n stone rests on a table. what is the force the table exerts on the stone? in what direction?

The force exerted by table on the stone will be 20 N in upward direction.

Explanation:

Balanced forces are defined as the forces which gets cancelled out when equal forces are acting in the opposite direction. The net force on the system comes out to be 0.

Unbalanced forces are defined as the forces which does not get cancelled out because unequal forces act on the system in opposite direction. The motion of the object is in the direction of net force.

According to the question:

The force exerted by the stone on the table in downward direction = 20 N

Net force acting on the stone = 0 N (because it is at rest)

So, the force exerted by the table on the stone will be same, which is equal to 20 N but in upward direction.

Hence, the force exerted by the table on the stone is 20 N in upward direction.

given data:

determine the horse power (h.p) = ?

force applied to move the box(f) = 10 pounds,

box lifted from a distance         (d) = 3 feet

time taken to lift                         (t) = 10 sec,

the horse power is defined as amount of work required to move a load. the horse power is equal to 550 foot-pound per second

                  1 h.p   = 550 foot-pound/second

it can also be defined as the the load that need to be move a body for certain distance in a certain amount of time.

mathematically,

                      h.p = (force × distance)/ time

                            = (10 × 3)/ 10

                            = 30/10

                            = 3 foot -pound/sec

hence, the horse power is needed to move the box is 3 foot-pound/second

important note: 1 h.p = 550 foot-pound/second = 746 watts