Is acceleration equal to the net force or directly proportional to the net force? How acceleration is related to mass?

Isaac Newton looks up at an apple. He is on planet earth and starts to think... which of his thoughts are true? (a) The force on the Earth is greater than the apple- because the Earth is more massive. (b) The force on the apple and the Earth are 0 because they aren't touching. (c) The force on the apple is greater than the Earth- because the Earth is more massive. (d) The force on the apple and the Earth are equal.

An astronaut weighing 191 pounds on Earth is on a mission to the Moon and Mars. a) How much would it weigh in newtons when on the Moon? The acceleration due to gravity on the Moon is one sixth that of the Earth b) How much would it weigh in newtons when it is on Mars, where the acceleration due to gravity is 0.38 times that of Earth? c) What is its mass in kilograms on Earth? Which of the following is true? (Select all that apply) _Its mass on the Moon is exactly equal to its mass on Earth. _Its mass on the Moon is smaller than its mass on Earth. _Its mass on Mars is smaller than its mass on Earth. _Its mass on the Moon is greater than its mass on Earth. _Its mass on Mars is exactly equal to its mass on Earth. _Its mass on Mars is greater than its mass on Earth.

A force F1 is applied to a mass M1. If the same force F1 is applied to a mass M2 = 4M1 the acceleration of mass M1 is: one-half the acceleration of the mass M2. twice the acceleration of the mass M2. the same as for the mass M2. four times the acceleration of the mass M2. one-fourth the acceleration of the mass M2.

Standing on a weighing scale, a 50-kg person is inside an elevator. What would the scale read if the elevator accelerates upward (away from the Earth) at a rate of 0.25g (or 25% of the acceleration due to gravity)? * 25 kg. 38 kg. 55 kg. О 63 кg O 75 kg.