1. Newton's 1st Law: A skydiver opened their parachute and now experiences a force of gravity of -450 N (down) and a force of air resistance of +450N (up). a) What is the net force (sum) acting on the skydiver?

What is a subatomic particle with a negative charge and very little mass?

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?