Question

gravitational acceleration is why, even though the pencil and the book from the beginning of the lesson were different masses, they hit the ground at the same time. even if the mass of an object increase, the force of gravity between the object and earth will also increase by the same amount. this is why the acceleration is always the same if no additional forces are acting on the object. the time-lapse photograph below shows a feather and an apple dropped at the same time in a vacuum. the apple has a greater mass than the feather. in a vacuum, there is no air resistance. air resistance is just friction between an object and the air, and it opposes gravity when an object falls, to make it fall slower. the apple and the feather fall at the same rate when there is no air resistance.

what is the unit for acceleration? *
1 point
○ m/s
○ m/s/s
○ kg
○ newtons

what is the unit for gravitational acceleration? *
1 point
○ m/s
○ m/s/s
○ kg
○ newtons

Explanation:

1. For the first question: Acceleration is defined as the rate of change of velocity. Velocity has units of m/s, so the rate of change of velocity (acceleration) has units of meters per second per second, or m/s/s. m/s is velocity, kg is mass, newtons is force.
2. For the second question: Gravitational acceleration is a type of acceleration, so it shares the same unit as general acceleration, which is m/s/s.

Answer:

• What is the unit for acceleration?

B. m/s/s

• What is the unit for gravitational acceleration?

B. m/s/s