Physics review Spring 2021

Which of the following is the formula for acceleration?

• $a=\frac{\Delta t}{\Delta v}$

• $a=\frac{\Delta v}{\Delta t}$

• $a=\frac{\Delta t}{\Delta m}$

• $a=\frac{\Delta m}{\Delta t}$

According to the graph , what is the displacement of the object from 5 sec to 14 sec?

• 13 m

• -13 m

• 3 m

• -3 m

According to the graph , what is the distance the object travels from 5 sec to 14 sec?

• 13 m

• -13 m

• 3 m

• - 3 m

What is the average velocity from 5 sec to 14 sec?

• - 0.93 m/s

• 0.93 m/s

• - 0.33 m/s

• 0.33 m/s

What is the average speed from 5 sec to 14 seconds?

• -0.93 m/s

• 0.93 m/s

• -0.33 m/s

• 0.33 m/s

What is the acceleration from 12 to 14 seconds?

• $0.25\ \frac{m}{s^2}$

• $-0.25\ \frac{m}{s^2}$

• $2\ \frac{m}{s^2}$

• $-2\ \frac{m}{s^2}$

If a vehicle starts from rest and accelerates to the right at 10 m/s² for 9s, what is the final velocity of the vehicle?

• 90 m/s

• 100 m/s

• 110 m/s

• 1.1 m/s

If you drop a rock from rest off of a high bridge into a river, what is the velocity of the stone after 6 seconds? (neglect air resistance)

• - 176.4 m/s

• 176.4 m/s

• - 58.8 m/s

• 58.8 m/s

An object in motion will stay in motion unless acted upon by an unbalanced force

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's 4th Law

A dog walking to the right with a speed of 1.0 m/s sees a cat and speeds up with a constant rightward acceleration of magnitude 8 m/s².

What is the distance the the dog traveled after 2 seconds?

• 14 m

• 16 m

• 18 m

• 20 m