Question

In: Physics

Find the resultant (magnitude and direction) of these forces: 300 N at 00 and 400 N...

Find the resultant (magnitude and direction) of these forces: 300 N at 0⁰ and 400 N at 150⁰.
After falling from a cliff that is 100 m high, a 30 kg rock hits the ground below. Neglecting air resistance, how fast was it moving just as it hit?
How much heat will it take to completely melt 2 kg of lead that is at 227⁰ C?
What is the mutual attractive gravitational force between two people, each with a mass of 60 kg standing 2 m apart?
A wheel rotates at 24 revolutions every 3 minutes. This is equivalent to A) 16π rad/s B) 50.2 rad/s C) 0.837 rad/s D) 1.19 rad/s

Solutions

Expert Solution

(1)

the Vector form of force

and

then resultat force is

then magnitude of force is

and direction is

(2)

using motion equation

(3)

the heat energy is

(4)

the force is

(5)

option (c)

genius_generous answered 1 year ago

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