Question

10. Which travels faster, a car that goes 200 miles in 2 hours, or a

truck that goes 300 miles in 2.5 hours?
11. Which travels faster, a snail that can go 20 cm in 3 minutes, or a
slug that can go 15 cm in 2 minutes?

Answer 1

Question 10. The truck travels faster.

Question 11. The slug travels faster.

Explanation:

Question 10.

1. Find the velocity of each vehicle.

`Speed=(distance)/(time)`

`Speed_(Car) =(200(miles))/(2(hours))=100mi/h. \\\\ Speed_(Truck) =(300(miles))/(2.5(hours)) =120mi/h.\\ \\`

2. Compare the velocities.

`Speed_(Car) =100mi/h < Speed_(Truck) =120mi/h.`

Hence, the trucks travels faster than the car.

-------------------------------------------------------------------------------------------------------

Question 11.

Apply the same method as in question 10.

1. Find the velocity of each body.

`Speed_(snail)=(20(cm))/((3 min)) =6.67cm/min.\\ \\Speed_(slug)=(15(cm))/((2 min)) =7.5cm/min.`

2. Compare the velocities.

`Speed_(snail)=(20(cm))/((3 min)) =6.67cm/min < Speed_(slug)=(15(cm))/((2 min)) =7.5cm/min.`

Hence, the slug travels faster.