Consider what happens when you jump up in the air. A) Since the ground is stationary, it cannot exert the upward force necessary to propel you into the air. Instead, it is the internal forces of your muscles acting on your body itself which propels the body into the air.
What is the best explanation for what happens when you jump on Earth?
Being elastic, the entire earth does not accelerate all at once away from you when you jump. Instead, you just deform a tiny bit of earth right under your feet. If the ground you are standing on is loose and weak, such as sand or mud, then the deformation caused by jumping only travels a few meters.
What would happen if we all jumped at the same time?
Because people are spread somewhat equally around the planet’s spherical surface , if we all jumped in place, nothing much would happen — all our lift-offs and impacts would cancel each other out, resulting in zero net force on the Earth, according to work by physicist Rhett Allain….
What is the net force on a falling 100 N barrel?
Answer: The net force on the barrel will be 4900N in the upward direction. Explanation: According to Newton’s third law of motion: “Action and reaction forces are equal but opposite in direction”….
Why does a hammer and a feather fall at the same rate?
It is because it has a higher surface area to weight ratio, thus is slowed more by drag (or air resistance). On the moon there is no air, and no drag, and a hammer and a feather will fall at the same speed. The earth’s gravity pulls all objects down at the same rate(9.8 m/s 2), assuming there is no air resistance.
Can you determine the acceleration due to gravity by dropping a feather?
A hammer and a feather will fall with the same constant acceleration if air resistance is considered negligible. This is a general characteristic of gravity not unique to Earth, as astronaut David R. The acceleration of free-falling objects is therefore called the acceleration due to gravity.