Final answer:
To calculate the power needed to decelerate an amusement park ride from 30 m/s to 0 in 2 seconds, you need the mass of all riders. The power is the change in kinetic energy over time, which cannot be determined without the mass.
Step-by-step explanation:
The question asks how much power it took for a ride to slow from its maximum speed of 30 m/s to zero in 2 seconds. To solve this, you would need the combined mass of all the riders, the initial and final velocities, and the time over which the deceleration occurs.
Assuming you have the mass (m), the change in kinetic energy (ΔKE) can be calculated using the equation ΔKE = 0.5 × m × (v² - u²), where v is the final velocity (0 m/s) and u is the initial velocity (30 m/s). The power (P) is then found using the equation P = ΔKE / t, where t is the time (2 seconds). Without the riders' mass, however, we cannot calculate the exact power.