Free Fall

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

• 5,10,15, 20, 25 m/s²

• 10, 20, 30, 40, 50 m/s²

• 5, 20, 45, 80, 125 m/s²

• 10,10,10,10,10 m/s²

What is the vertical 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

A ball is thrown upwards and caught when it comes back down at the same height. In the absence of air resistance, the speed of the ball when caught would be

• less than the speed it had when thrown upwards.

• more than the speed it had when thrown upwards.

• the same as the speed it had when thrown upwards.

• need more information to determine.

A freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about:

• 6m/s

• 36m/s

• 60m/s

• 12m/s

Juan is standing on the top observation deck of the Eiffel Tower in Paris at a height of 300 meters. He drops his cell phone. How fast will the phone be traveling when it hits the ground? Ignore the effect of air resistance.

• 9.8 m/s

• 76.68 m/s

• 149.76 m/s

• 46.99 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

A ball is thrown upward in the air with an initial velocity of 40 m/s. How long does it take to reach back to the point it was thrown from?

• 4 seconds 
• 2 seconds 
• 6 seconds 
• 8 seconds 

If a ball is thrown up at 40 m/s, how many seconds does it take reach the top of its path? (Assume no air resistance)

• 8 s

• 4 s

• 10 s

• 0.1 s

If a ball is thrown straight up with a velocity of 30 m/s, how long until it can be caught at the same height? (Assume no air resistance)

• 3 s

• 6 s

• 10 s

• 1.5 s

If a ball is dropped, what is the speed of the ball 3 seconds later? (Assume no air resistance)

• 30 m/s

• -30 m/s