Question

a toy car rolls 10 meters in 5 seconds on the tile floor and 10 meters in 8 seconds on the carpet. what is the cars speed on each surface, and which surface helps it maintain a constant speed better? a. tile = 2 m/s; carpet = 1.25 m/s → tile helps maintain a constant speed better. b. tile = 10 m/s; carpet = 8 m/s → carpet helps maintain a constant speed better. c. tile = 2 m/s; carpet = 1.25 m/s → both surfaces give the same constant speed. d. tile = 5 m/s; carpet = 10 m/s → carpet makes the car go faster.

Explanation:

Step1: Calculate speed on tile

Speed formula is $v=\frac{d}{t}$. For tile, $d = 10$ m and $t = 5$ s. So $v_{tile}=\frac{10}{5}=2$ m/s.

Step2: Calculate speed on carpet

For carpet, $d = 10$ m and $t = 8$ s. So $v_{carpet}=\frac{10}{8}=1.25$ m/s.

Step3: Analyze constant - speed maintenance

Tile has less friction generally, so it helps maintain a constant speed better.

Answer:

A. Tile = 2 m/s; Carpet = 1.25 m/s - Tile helps maintain a constant speed better.