An object is dropped from rest from \(20\,\mathrm{m}\). Ignoring air resistance, find the fall time using \(g=9.8\,\mathrm{m\,s^{-2}}\).

An object is dropped from rest from \(20\,\mathrm{m}\). Find the impact speed using \(g=9.8\,\mathrm{m\,s^{-2}}\).

An object is launched upward at \(9.8\,\mathrm{m\,s^{-1}}\). Find time to top and maximum height.

An object is launched upward at \(14\,\mathrm{m\,s^{-1}}\). Find its maximum height above launch point.

An object is launched upward at \(14\,\mathrm{m\,s^{-1}}\). Find the time to reach the top.

An object is thrown upward from a \(25\,\mathrm{m}\) balcony with \(v_{0y}=10\,\mathrm{m\,s^{-1}}\). Find its height after \(3\,\mathrm{s}\).

An object is launched upward from and returns to the same height with \(v_0=14\,\mathrm{m\,s^{-1}}\). Find the total flight time.

An object is dropped from \(30\,\mathrm{m}\). Find its height and velocity after \(2\,\mathrm{s}\), taking upward as positive.

If upward is positive, what is the sign of gravitational acceleration? What if downward is positive?

An object is dropped from \(10\,\mathrm{m}\). Write and solve the equation for when it reaches the ground.

An object is thrown downward from \(40\,\mathrm{m}\) with \(v_{0y}=-5\,\mathrm{m\,s^{-1}}\). Find \(y\) and \(v_y\) after \(2\,\mathrm{s}\).

Does mass appear in the ideal free-fall equations near Earth?

An object is dropped from rest and falls \(5\,\mathrm{m}\). Find the fall time.

Why is acceleration not zero at the top of a free-fall trajectory?

At the highest point of an upward launch, what are \(v_y\) and \(a_y\)?

An object is launched upward at \(20\,\mathrm{m\,s^{-1}}\). Find \(v_y\) and height above launch after \(1.5\,\mathrm{s}\).

An object is launched upward and later returns to the launch height. How does its return velocity compare with its launch velocity?

What launch speed is needed to reach a maximum height of \(15\,\mathrm{m}\)?

An object is dropped from rest. How far has it fallen after \(3\,\mathrm{s}\), and what is its velocity?

Two objects of different masses are dropped together with air resistance ignored. Which has the larger acceleration?

A stone is thrown upward from a \(30\,\mathrm{m}\) cliff with \(v_{0y}=12\,\mathrm{m\,s^{-1}}\). Taking upward positive, find the time when it reaches the ground.

A ball is thrown upward from ground level. It passes \(15\,\mathrm{m}\) on the way up at \(t=1.0\,\mathrm{s}\). Find its launch speed and the later time when it passes \(15\,\mathrm{m}\) again.