Question

At Ocean World, Wall the Whale uses 800 Newtons of force to jump out of the water 10 meters into the air. Wally does this trick four times a day. He is able to get 10 meters high in 3.5 seconds. How much work does Wally do each day? What is his average speed with each jump?

Answer 1

Wally the Whale does 32,000 Joules of work each day by jumping out of the water 10 meters high four times. For each jump, his average speed is 2.86 meters per second.

Step-by-step explanation:

To calculate the work done by Wally the Whale, we use the formula for work, which is Work = Force × Distance. Since Wally uses 800 Newtons of force to jump a distance of 10 meters, the work done for each jump is 800 N × 10 m = 8000 Joules. Since Wally jumps four times a day, the total work done each day is 4 × 8000 J = 32000 Joules.

Wally's average speed for each jump can be calculated using the formula for average speed, which is Average Speed = Distance ÷ Time. The distance is 10 meters, and the time for each jump is 3.5 seconds. So, the average speed is 10 m ÷ 3.5 s ≈ 2.86 m/s.

Thus, Wally does 32,000 Joules of work each day, and his average speed during each jump is 2.86 meters per second.