Homework Statement
Compute the angular velocity (ω) when the arm reaches 45 degrees
equation = ω^2 = ωi^2 + 2α(Δθ)
α = 196.85
Homework Equations
equation = ω^2 = ωi^2 + 2α(Δθ)
The Attempt at a Solution
2(196.85)(45) ??
what do i use for ωi^2? or is it just 0
Homework Statement
Mass of bucket and 63 pennies - 182 gm
Mass of projectile - 1 gm
Mass of arm - 3 gm
the total length of the arm is 24.6 cm
Compute the oment of inertia of the trebechet
Homework Equations
I = Ei mi * ri^2
The Attempt at a Solution
how do i start this...
Homework Statement
A cord is anchored to a wall at one end. It passes over a pulley and is attached to a mass at the other end. When the cord is plucked, it vibrates in its fundamental mode. The sound waves that emerge from the cord have a wavelength of 78cm. The cord is 63cm long and has a...
so the weight of the ball = the buoyant force necessary to keep the object in equilibrium?
if so the answer would be 5.4 which would be different from the answer sheet.
Homework Statement
Rubber ball filled with air has a diamter of 25.0 cm and a mass of .540 kg. what force is required to hold the ball in equilibrium immediately below the surface of water?
Homework Equations
anyone want to help me out with an equation here?
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Starting from rest, a 5.00 kg block slides 2.50 m down a rough 30.0 incline. The coefficient of kinetic friction betwen the block and incline is .436
i need to find the work done by the force of gravity, work done by the friction force between block and incline and the work done by the normal...