Answer:
North of East
Explanation:
two forces on the hockey puck is given as
at 15 degree North of East
similarly other force is
at 55 degree North of East
Now net force on the puck is given as
magnitude of force is given as
magnitude of acceleration
direction of acceleration is given as
North of East
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Answer:
The surface temperature of the brake shoe and drum is 95°C.
Explanation:
Given that,
Rate of heat = 75 W
Surface area = 0.1 m²
Heat transfer coefficient = 10 W/m²
Temperature = 20°C
We need to calculate the surface temperature of the brake shoe and drum
Using equation of heat
Put the value into the formula
Hence, The surface temperature of the brake shoe and drum is 95°C.
1,000 grams = 1 kilogram
so 55 megagrams = 55,000 kilograms
100 cm = 1 meter
so 500 cm = 5 meters
Acceleration of gravity on Earth = 9.8 m/s²
Weight = (mass) x (gravity)
========================================
Work = increase in potential energy =
(weight) x (height) =
(mass) x (gravity) x (height) =
(55,000 kg) x (9.8 m/s²) x (5 m) =
2,695,000 joules .