P6.3 (ii) Free-fall

Part A of the graph is from 0s to 25s. Which of these statements is true about Part A?

• The object is at rest.

• The object is accelerating (its velocity is increasing)

• The object is decelerating (its velocity is decreasing)

• The object is moving at a constant velocity.

Part B of the graph is from 25s to 35s. Which of these statements is true about Part B?

• The object is at rest.

• The object is accelerating (its velocity is increasing)

• The object is decelerating (its velocity is decreasing)

• The object is moving at a constant velocity.

Part C of the graph is from 35s to 55s. Which of these statements is true about Part C?

• The object is at rest.

• The object is accelerating (its velocity is increasing)

• The object is decelerating (its velocity is decreasing)

• The object is moving at a constant velocity.

You can calculate the slope of a velocity-time graph.

If you calculate the slope of the graph between two points, what would that tell you?

• The velocity of the object.

• The distance travelled by the object.

• The acceleration of the object.

• The mass of the object

Which section of the graph shows acceleration?

• AB
• BC
• EF
• FG

Which section of the graph shows deceleration?

• AB
• BC
• EF
• GH

Which section represents a steady speed?

• A

• B

• C

• D

State the size of the acceleration in section B.

(a)  

Marc rode his bike 2 miles to his friends house. He and Caleb then rode 3 miles to the mall. The mall was really only 4 miles from Marc's house. What was the distance Marc traveled to get to the mall?

• 5 miles

• 3 miles

• 4 miles

• 9 miles

Acceleration is

• increasing speed
• decreasing speed
• changing direction
• all of the above