QUESTION 14
A chimney (length 12.3 m, mass 174 kg] cracks at the base and topples. Assume:
- the chimney behaves like a thin rod, and does not break apart as it falls.
- only gravity (no friction) acts on the chimney as it falls.
- the bottom of the chimney pivots, but does not move.
Find the linear speed of the very top of the chimney, in m/s, just as it hits the ground.
QUESTION 15
A 61.8 kg cart travels at constant speed, and its four wheels are rolling without slipping. The wheels are disks (radius 0.126 m, mass 8.18 kg), and they turn at constant ω = 39.5 rad/s. Find the total kinetic energy of the cart.
NOTE: first, you must find the speed of the cart!
QUESTION 14 A chimney (length 12.3 m, mass 174 kg] cracks at the base and topples. Assume:...
Problem -2 A hollow ball of radius 0.5 m and mass 4.5 kg is rolling without slipping on a level surface at a constant speed of 4.0 m/s. The ball rolls up a 40- ramp and eventually stops before rolling back down. (the moment of inertia of a hollow ball of mass M and radius RisMR2) Find: (a) the angular (rotational) speed of the ball (in rad/sec) just before it begins to move up the ramp: (b) the rotational kinetic...
Problem #2 A hollow ball of radius 0.5 m and mass 4.5 kg is rolling without slipping on a level surface at a constant speed of 4.0 m/s. The ball rolls up a 40° ramp and eventually stops before rolling back down. (the moment of inertia of a hollow ball of mass M and radius R is MR2) Find: (a) the angular (rotational) speed of the ball (in rad/sec) just before it begins to move up the ramp; (b) the...
A spherical bowling ball with mass m = 3.8 kg and radius R = 0.106 m is thrown down the lane with an initial speed of v = 8 m/s. The coefficient of kinetic friction between the sliding ball and the ground is p = 0.33. Once the ball begins to roll without slipping it moves with a constant velocity down the lane. 1) What is the magnitude of the angular acceleration of the bowling ball as it slides down...
A spherical bowling ball with mass m = 4 kg and radius R = 0.114
m is thrown down the lane with an initial speed of v = 8.7 m/s. The
coefficient of kinetic friction between the sliding ball and the
ground is ? = 0.32. Once the ball begins to roll without slipping
it moves with a constant velocity down the lane.
1)
What is the magnitude of the angular acceleration of the bowling
ball as it slides down...
A spherical bowling ball with mass m = 3.3 kg and radius R = 0.111 m is thrown down the lane with an initial speed of v = 8.9 m/s. The coefficient of kinetic friction between the sliding ball and the ground is μ = 0.29. Once the ball begins to roll without slipping it moves with a constant velocity down the lane. 1)What is the magnitude of the angular acceleration of the bowling ball as it slides down the...
please answer both questions.
A boy in a wheelchair (total mass 53.5 kg) has speed 1,40 m/s at the crest of a slope 2.30 m high and 12.4 m long. At the bottom of the slope his speed is 7.00 m/s. Assume air resistance and rolling resistance can be modeled as a constant friction force of 41.0 N. Find the work he did in pushing forward on his wheels during the downh ride. 245.45 Your response differs from the correct...
A block of mass m = 3.5 kg is
on an inclined plane with a coefficient of friction
μ1 = 0.31, at an
initial height h = 0.53 m above
the ground. The plane is inclined at an angle θ =
54°. The block is then compressed against
a spring a distance Δx = 0.11 m
from its equilibrium point (the spring has a spring constant of
k1 = 39 N/m) and
released. At the bottom of the inclined plane...