Question

Anthony carelessly rolls his toy car off a 78.0-cm-high table. The car strikes the floor at a horizontal distance of 98.0 cm from the edge of the table.

(a) What was the velocity with which the car left the table? (Enter the magnitude.) m/s

(b) What was the angle of the car's velocity with respect to the floor just before the impact? ° below the horizontal

Answer 1

Given:

Initial launch height of the toy car,

Initial vertical velocity of the toy car,

Horizontal distance covered by the toy car,

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(a) What was the velocity with which the car left the table?

First, find the time of flight

Consider the vertical motion of the toy car

Use formula

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Consider the horizontal motion of the toy car

There is no acceleration in the horizontal direction, so horizontal velocity remains constant.

Horizontal velocity = Horizontal distance/Time of flight

(a) ANSWER:

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(b) What was the angle of the car's velocity with respect to the floor just before the impact?

Consider the vertical motion of the toy car

Use formula

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Consider the horizontal motion of the toy car

There is no acceleration in the horizontal direction, so horizontal velocity remains constant.

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Direction,

(b) ANSWER:

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