DOL Mass and Acceleration 11-4-24

1. A backpack has a mass of 8 kilograms, and a lunchbox has a mass of 2 kilograms. Which item has more mass?

• Backpack
• Lunchbox
• None

2. Which of the following best defines acceleration?

• The speed at which an object is moving.
• The change in an object's velocity and direction over time.
• The force of gravity acting on an object.
• The distance an object has traveled.

3. If a car is initially at rest and then speeds up, what is happening to the car's acceleration?

• The acceleration is decreasing.
• The acceleration is constant.
• The acceleration is zero.
• The acceleration is increasing.

4. Part A A mother and daughter press their hands together and then push them apart while ice skating. Immediately after they push away from each other, how does the motion of the mother and daughter change?

• The mother moves forward, and the daughter moves backward with greater acceleration.
• Both move forward, but the mother moves with greater acceleration.
• The mother moves backward, and the daughter moves forward with greater acceleration.
• Both move backward, but the daughter moves with greater acceleration.

Part B Explain how the mass of the daughters' allows her to have greater acceleration?

5. Part A A skier needs to apply a force of 132 N to accelerate at a rate of 2 m/s2. What is the mass of the skier?

• 264Kg
• 134Kg
• 66Kg
• 130Kg

Part B Explain how to solve for the skier's mass? To solve for the skier's mass you must __________________.