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Calculate the tension in the rod if the pub sign is an 80, c, m,
80cm square of mass 30, k, g,
30kg. Ignore the mass of the rod, assume that the hinge is well-oiled, and assume that the mass is evenly distributed in the sign. Give your answer to 2 significant figures.
A block whose mais com is at rest on a table top and is fastened to an anchored (6) horizontal spring. The spring constant of the spring is 35 Nm. There is negligible friction between the block and the table top. The block is pulled a distance x 10 cm from its equilibrium position Calculate the
Force executed by the spring on the block just before it released (ii) Time period of the oscillation (11) Mechanical Energy of the oscillating system A body is vibrating with SHM of amplitude 15 cm and frequency 4 cycles per second (4) Calculate maximum values of its vclocity and Acceleration
a baby blue jay sits in a tall tree awaiting the arrival of its dinner. As the motherlands, on the nest, she drops a worm towards the hungry chicks mouth, but the worm misses and falls from the nest to the ground in 1.50 second. How high up is the nest?
the steamboat geyser in yellowstone national park is capable of shooting its hot water up the ground with a speed of 48.0 m/s. How high can this geyser shoot?
A 8000 kg truck travelling at 4 m/s east collides with 2000 kg car moving at 16 m/s in direction 300 south of west. After collision, the two vehicles remains tangled together.
i) Find the momentum of lorry and the car before the collision.
ii) With what speed and in what direction does the wreckage begin to move?
iii) Is this an elastic collision? Verify your answer.
(a) A merry-go-round with 5 m radius is rotating around its vertical axis with a rate of 0.30 rev/s. A 90 kg man jump on to the merry-go-round and he lands and remains at a distance of 3 m from the axis of rotation. If the moment of inertia of the merry-go-round is 10,000
kgm2, find the new rate of rotation after the person has landed.
The same merry-go-round mentioned in the part (a) is at rest and a 90 kg man is standing at the edge of the merry-go-round. Then he starts to walk around the perimeter at a speed of 0.8 m/s relative to the ground. What rotation rate does this motion give to the merry-go-round?
plz help!!!
A merry-go-round with 5 m radius is rotating around its vertical axis with a rate of 0.30 rev/s. A 90 kg man jump on to the merry-go-round and he lands and remains at a distance of 3 m from the axis of rotation. If the moment of inertia of the merry-go-round is 10,000
kgm2, find the new rate of rotation after the person has landed.
A pulley of 7.0 cm radius, on a motor, is turning at 30 rev/s accelerates uniformly to 50 rev/s in 2.0 s. Find,
i. the angular acceleration of the motor
ii. the number of revolutions it makes in this time.
iii. the length of the belt it winds in this time.
