Physical Science Midterm Review

What is the final velocity of a tennis ball that is dropped from a roof top after 5 seconds?(acceleration = final velocity - initial velocity / time)

• 1.96 m/s²
• 1.96 m/s
• 49 m/s² 
• 49 m/s

Tags

NGSS.MS-PS2-2

The x-rays range between ____.   

•  radio waves and infrared rays.
•  infrared rays and ultraviolet rays.
• radio waves and visible light
•  ultraviolet rays and gamma rays

Which of the following BEST describes why someone may NOT be able to lift a full wheelbarrow by its handles? 

• The resistance force is not great enough to overcome the effort force. 
• The effort force is not great enough to overcome the resistance force. 
• The effort force is not great enough to raise the fulcrum.
•  The resistance force is not great enough to raise the fulcrum

Electromagnetic radiation with the longest wavelengths is ____.

• gamma rays
• x-rays
• microwaves
• radio waves

What is the velocity of golf ball with a mass of 0.8 kg and 200 J of kinetic energy?  (KE = 1/2 mass x velocity²)

• 15.8 m/s
• 22.4 m/s
• 16,000 m/s
• 125 m/s

When light is reflected from a surface, as the angle of incidence decreases, the angle of reflection ____.

• increases
• decreases
• stays the same
• cannot be determined

If the length of a frictionless ramp being used to lift a heavy box onto a porch is halved, the effort force will _?_.

• remain the same.
• double.
• halve.
• quadruple.

When two or more simple machines work together a _?_ is formed.

• complex machine
• compound machine
• block and tackle
• none of these

Brian uses 8,400 J of work to push a box 28 meters.  How much force did he use  to move the box? (Work = Force x distance)

• 300 N
• 300 J
• 235, 200 J
• 235, 200 N

Tags

NGSS.MS-PS2-2

Which block and tackle pulley system(s) has a mechanical advantage of 3?

• A only
• B and C only
• D and E only
• none of these