Arobotic rover on mars finds a spherical rock with a diameter of 10 centimeters [cm]. the rover picks up the rock and lifts it 20 centimeters [cm] straight up. the rock has a specific gravity of 4.75. the gravitational acceleration on mars is 3.7 meters per second squared [m divided by s squared]. if the robot's lifting arm has an efficiency of 40% and required 10 seconds [s] to raise the rock 20 centimeters [cm], how much power in units of watts [w] did the arm use?

Power = 0.46 W

Explanation:

Given data:

distance  by which rock lift up is 20 cm

specific gravity of rocks is 4.75

Gravitational acceleration on mars is 3.7 m/sec

Efficiency 40%

we know that specific gravity of rocks

we know

work done is

w = 4.6 j

oil flow is a highly convective flow compared to water flow at normal temperature and pressure.

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