Question

Which of these is true about an object thrown straight up in the absence of air resistance? Its acceleration increases as it falls. Its acceleration and velocity are both momentarily zero at maximum height. Its acceleration is constant. The direction of its velocity is constant.

Answer 1

Its acceleration is constant . . . 9.8 M/s-squared downward. That's the acceleration of gravity on Earth.

Answer 2

When an object is thrown straight up in the absence of air resistance its acceleration is constant throughout which is 9.81 m/s².

What is the acceleration due to gravity?

Acceleration due to gravity is the acceleration gained by an object due to the gravitational force of the earth. It is represented in m/s² which is a unit of acceleration. The Acceleration due to gravity is a vector quantity, which means it has both a magnitude and a direction. Generally, the standard value of acceleration due to gravity is 9.81 m/s².

When an object is thrown straight up in the absence of air resistance there is no external force acting on it except the gravitational force of the earth which very much reflects the fact that the acceleration due to gravity is constant and is the result of the gravitational pull of the earth which act on the downward direction.

Hence, when an object is thrown straight up in the absence of air its acceleration would be constant , therefore the correct option is C.

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