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Kinematics of Free Falling Objects

Kinematics of Free Falling Objects

Assessment

Interactive Video

Physics, Mathematics, Science

9th - 12th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

This video tutorial explores a vertical free fall problem where a rock is launched from a height of 2 meters with an initial velocity of 45 m/s. The video uses a coordinate system with the origin at ground level and positive direction upwards. It demonstrates how to calculate the height and velocity of the rock after 3 seconds using kinematic equations. The tutorial concludes with an invitation to explore more physics and math resources.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial height of the rock in the vertical free fall problem?

3 meters

1 meter

0 meters

2 meters

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which direction is considered positive in the coordinate system used in the problem?

Downward

Upward

Leftward

Rightward

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial velocity of the rock?

30 meters per second

45 meters per second

60 meters per second

75 meters per second

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which kinematics equation is used to calculate the height of the rock?

v = u + at

s = vt - 1/2 at^2

s = ut + 1/2 at^2

v^2 = u^2 + 2as

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the height of the rock after three seconds?

92.9 meters

82.3 meters

72.5 meters

102.1 meters

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which kinematics equation is used to calculate the velocity of the rock?

v = u + at

s = ut + 1/2 at^2

s = vt - 1/2 at^2

v^2 = u^2 + 2as

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the acceleration due to gravity used in the calculations?

10.8 m/s²

9.8 m/s²

8.9 m/s²

11.8 m/s²

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