What happens when you apply a force to an object?

A 863-kg car starts from rest on a horizontal roadway and accelerates eastward for 5.00 s when it reaches a speed of 20.0 m/s. What is the average force exerted on the car during this time? kN eastward

Rick, an avid skydiver, is falling through the air with his parachute deployed. He recently ate a lot during Thanksgiving and gained 3.0kg from his original 62.0kg. The air resistance on Rick is 505 N [up). If g = 9.8 m/s/s [down] on Earth, what is the vertical net force on Rick?

Tom and his little sister are enjoying an afternoon at the ice rink. They playfully place their hands together and push against each other. Tom's mass is 61 kg and his little sister's mass is 15 kg. (a) Which of the following statements is correct? The force experienced by the sister is less than the force experienced by Tom. They both experience the same force.     The force experienced by Tom is less than the force experienced by his sister. b) Which of the following statements is correct? Tom's acceleration is more than the sister's acceleration. They both have the same acceleration.     Tom's acceleration is less than the sister's acceleration.   c) If the sister's acceleration is 2.6 m/s2 in magnitude, what is the magnitude (in m/s2) of Tom's acceleration?