Physical Science

Match the word to the correct definition: Centripetal Force

• How fast an object changes position

• The speed something is moving, in a specific direction

• The inward force that chances straight-line motion to circular motion (e.g. the force that keeps the water in a bucket when you swing it around).

Use the formulas from your newspaper to calculate the answer: A 20-N force is exerted on an object with a mass of 5kg. What is the acceleration of the object?

• 100 m/s/s

• 5 m/s/s

• 4 m/s/s

Tags

NGSS.MS-PS2-2

Use the formulas from your newspaper to calculate the answer: A 10kg ball accelerates at a speed of 5 m/s/s. What force was applied to make the ball accelerate at that speed?

• 100 N

• 50 N

• 5 N

Tags

NGSS.MS-PS2-2

Which of these would be the best way to find out whether a toy car will roll faster down a board covered with sandpaper, or a board covered with aluminum foil?

• Measuring the time it takes the car to roll all the way down each board

• Measuring how much weight each board will hold before breaking

• Measuring the length and height of each board

Tags

NGSS.MS-PS2-2

In order for an object to move, the forces on it must be __________.

• Balanced

• Unbalanced

Tags

NGSS.MS-PS2-2

A 50-N force (push) is applied to a 10 kg chair, but the chair does not move. Why might this happen?

• The forces are unbalanced

• The force of the push is balanced by an equal force in the opposite direction

• The distance the chair moved is very small

Tags

NGSS.MS-PS2-2

In your newspaper, look at this data table in the article "Graphing Speed." What was the total distance traveled in the first three minutes?

• 950 m

• 3200 m

• 1200 m

This law explains that there forces always occurs in pairs (equal and opposite).

• Newton's 1st Law of Motion

• Newton's 2nd Law of Motion

• Newton's 3rdLaw of Motion

Tags

NGSS.MS-PS2-1

Which scientist explained why a pitcher can throw a curve ball?

• John Paul Stapp

• Sir Isaac Newton

• Heinrich Magnus

Tags

NGSS.HS-PS2-1

What is solubility?

• The ability of a substance to dissolve in another substance

• The ability of a substance to freeze

• The ability of a substance to conduct electricity

• The ability of a substance to attract magnets

Answer explanation

Solubility refers to the ability of a substance to dissolve in another substance, making the correct answer choice the ability of a substance to dissolve in another substance.

Tags

NGSS.MS-PS1-4