Adv Physical Science-Chapter 3 Exam

Which of the following statements are true about mass?

• mass is how much an object weighs
• mass is how much potential energy an object has
• mass is the amount of "stuff" or matter that an object is made of
• mass changes depending on if you are on the earth or on the moon

Which statements are true about inertia?

• inertia is the tendency of objects to remain stationary or in motion unless acted upon by a force
• inertia is Newton's first law of motion
• if inertia did not exist, we would not have to wear seatbelts
• inertia only affects heavy objects

Which statement is true about Newton's second law of motion?

• force = mass x acceleration
• all objects require the same effort to get them going
• a moving object with a large mass takes more force to slow than a moving object with a small mass

If a ball with a mass of 2 kg was kicked and as a result accelerated at 10 m/s², how much force did the kick have?

• 2 kg
• 2 N
• 20 N
• 20 kg

Which of the following statements best describes a reference point?

• moving object
• moving object that is used to describe a non-moving object
• non-moving object that is used to describe a moving object
• non-moving object

Which of the following statements is true about speed?

• to measure speed, you need a reference point
• speed is always fast
• speed = distance traveled divided by the time it took

Which of the following statements best describes velocity?

• velocity is the speed of an object
• velocity is the speed of an object in a certain direction for a certain amount of time multiplied by the distance
• velocity is the speed of an object in a certain direction

Which of the following equations are used to calculate the average velocity?

• distance divided by time in a certain direction
• distance multiplied by time in a certain direction
• displacement divided by time in a certain direction
• displacement multiplied by time in a certain direction

Which of the following equations are used to calculate the average speed?

• distance divided by time
• distance multiplied by time
• displacement divided by time
• displacement multiplied by time

If you pointed your racer toward the sun rise and calculated it's velocity to be 2 meters per second east, how would you express your velocity in miles per hour? (Note: 1609 meters = 1 mile)

• 4.5 miles per hour east
• 4.5 miles per hour west
• 1.8 miles per hour east
• 1.8 miles per hour west