Question

What is the average speed of the ladybug?

A) 0.25 cm/s
B) 0.5 cm/s
C) 0.75 cm/s
D) 1 cm/s

What is the average velocity of the ladybug?
A) 0.25 cm/s
B) 0.5 cm/s
C) 0.75 cm/s
D) 1 cm/s

A sports car accelerates from rest to 26.8 m/s (roughly 60 mi/h) in 5.1 seconds. What is the acceleration of the car?
A) 5.27 m/s²
B) 5.25 m/s²
C) 5.23 m/s²
D) 5.21 m/s²

Classify the following measurements as vector or scalar quantities:

A) 2.35 m, up
B) 4.2 s
C) 6.8 cm²
D) 7.3 km/s, 30° N of E

Answer 1

The average speed of the ladybug is 23.6 cm. The average velocity of the ladybug is 56 cm to the right and 19 cm to the left.

Step-by-step explanation:

The average speed of the ladybug can be calculated by dividing the total distance traveled by the total time taken. In this case, the ladybug walks 15 cm + 56 cm + 3 cm + 25 cm + 19 cm = 118 cm in a total time of 5 movements. Therefore, the average speed is 118 cm / 5 = 23.6 cm.

The average velocity of the ladybug takes into account the direction of motion. Since the ladybug moved both towards and away from the wall, its total displacement is not zero. The vector of its total displacement can be calculated by summing up the displacements in the x and y directions. In this case, the ladybug moved 56 cm towards the wall and 19 cm away from it. Therefore, the total displacement vector is 56 cm to the right and 19 cm to the left.