dropped objects

If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by 

• about 5 m/s.
• about 9.8 m/s.

• about 15 m/s.
• a rate that depends on its initial speed.

What is the velocity of a ball that has been dropped off a cliff after 1 , 2, 3, 4, and 5 seconds? (assume g is rounded to 10 m/s²)?. 

• 10, 20, 30, 40, 50 m/s
• 5, 10, 15, 20, 25 m/s
• 5, 20, 45, 80,125 m
• 10,10,10,10,10 m/s

Free fall is any motion of a body where ____ is the only force acting upon it.

• body attraction

• tension

• gravity

• velocity

Two rocks with different size and mass are dropped from the same height. Which of the rock will reach the ground first?

• greater rock

• smaller rock

• both reach the ground at the same time

If an object is in free fall for three seconds, how fast will it be falling at the end of its motion?

vf= gt

• 9.8 m/s

• 19.6 m/s

• 29.4 m/s

• 39.2 m/s

A pumpkin is dropped from a 35 m building. What is its initial velocity (v_i)?

• 9.8 m/s²
• 35 m
• 0 m/s
• 9.8 m/s

An object falls from a high building. Ignoring air resistance, what will its velocity be after 6 seconds of falling?

vf=gt

• 9.8 m/s

• 58.8 m/s

• 6 m/s

• 8 m/s

If an object is in free fall for 3 seconds, how fast will it be falling at the end of its motion?

• -9.8 m/s

• -19.6 m/s

• -29.4 m/s

• -39.2 m/s

A textbook is dropped from a second floor window and falls to the ground. What happens to the velocity as the book falls to the ground

• the velocity increases

• the velocity decreases

• the velocity remain constant

A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground

• the acceleration increases

• the acceleration decreases

• the acceleration remains constant