A ball is thrown vertically upwards with an initial velocity of 22 m/s. When will its speed be 10 m/s?

The ball's speed will be 10 m/s at t=1.22 seconds

Step-by-step explanation:

The vertical motion of an object is controlled by the force of gravity. This means that there is a non-zero net force acting on the object that makes it accelerate downwards.

If the object is thrown upwards at speed vo, its speed at time t is:

Where g is the acceleration of gravity

Our ball is thrown upwards with v0=22 m/s. We need to calculate the time when its speed is vf=10 m/s.

Solving the above equation for t:

Substituting:

t=1.22 seconds

The ball's speed will be 10 m/s at t=1.22 seconds