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zepelin [54]
3 years ago
12

You are travelling at 60.0 mph on the Grand Central Parkway near exit 10 where it is (nearly) parallel to the Long Island Expres

sway (LIE). a) A truck on the LIE going in the SAME direction as you is travelling at 55.0 mph. What is YOUR relative velocity compared to that truck? b) A truck on the LIE going in the OPPOSITE direction as you is travelling at 55.0 mph. What is YOUR relative velocity compared to that truck?
Physics
1 answer:
Romashka-Z-Leto [24]3 years ago
4 0

Answer:

a)Vr= 5 mph

b)Vr= 115 mph

Explanation:

Lets

your velocity ,u= 60 mph

velocity of truck ,v= 55 mph

When object are moving in opposite direction the relative velocity  = u +v When object are moving in opposite direction the relative velocity  = u - v

a)

Truck is moving in the same direction ,so the  relative velocity

Vr= = u - v

Vr= 60 - 55

Vr= 5 mph

b)

Truck is moving in the opposite direction ,so the  relative velocity

Vr= = u+v

Vr= 60 + 55

Vr= 115 mph

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The time for travel is kept constant for all mediums.

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We start by calculating the work done by the airplane during the climb, which is equal to its change in gravitational potential energy:

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Now we can calculate the power delivered, which is given by

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