Spiderman (m= 80 kg) runs with an acceleration of 3.0 m/s2. a) How much horizon-tal force does he exert on the ground?

Two technicians are discussing a starter that clicks repeatedly when the key is turned to the crank position. technician a says the solenoid hold-in winding is open. technician b says the solenoid pull-in winding is open. who is correct?

Ivana walks 2km north then turns around and walks 3km south

In set c, explain the difference in the magnitudes of the gravitational forces between the two pairs of objects