Question

You toss a truck into the air at an angle of theta above the horizontal so that it will travel in an arc... off the side of a cliff - in the middle of winter. After you throw it, you know the following:

1. the horizontal component of the truck's velocity is 16.4 m/s.
2. the vertical component of the truck's velocity is 16.9 m/s.
3. The truck is in free fall (no air resistance) while it is in the air.

What is the magnitude of the truck's velocity 8 seconds after you throw it? (t = 8 s)

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Hint: If you get a negative value for either the vertical or the horizontal component of the velocity don't worry! When you combine them the values will be squared, so the negatives should go away. You should have a positive number!

Answer 1

This is a projectile motion

Here

Horizontal Component of velocity doesnot change throughout the motion : at t = 8 s ,

Vertical Component of velocity change under the influence of gravity,

Vertical Component of velocity ,      

Magnitude of Velocity is given by