The object penny has a faster unit per hour than the rocket. It is faster at 56.4 km/h. Using the speed-distance-time relation, the required value is calculated.
The speed-distance-time relation is given by the formula:
speed = distance/time
Units: distance - m or km; time - sec or min or hours; speed - m/sec or km/hours
It is given that,
A rocket travels 208 km in 50 minutes and a penny is dropped from a skyscraper and traves 153 km in 20 minutes.
So,
The speed of the rocket is
Rs = distance traveled by rocket/time taken to travel
= 208/50
= 4.16 km/minutes
The speed of the penny is
Ps = distance traveled by penny/time taken to travel
= 153/20
= 5.1 km/minutes
Converting into km/hour:
Rs = 4.16 km/min = 4.16 × 60/hour = 249.6 km/hour
Ps = 5.1 km/min = 5.1 × 60/hour = 306 km/hour
Therefore, the penny has more speed than the rocket.
The penny is faster than a rocket by the speed
= 306 - 249.6 = 56.4 km/h
Hence, the penny is faster by 56.4 km/h.
Learn more about the speed formula here:
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