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Q. A 3.2 mass attached to a spring with a spring constant of 114 is oscillating in a vat of oil, which damps the oscillations. If the damping constant of the oil is 10 kg/s, how long will it take the amplitude of the oscillations to decrease to 1.0% of its original value?
Q. A projectile, fired with unknown initial velocity, lands 21.8 s later on the side of a hill, 2790 m away horizontally and 479 m vertically above its starting point. (Ignore any effects due to air resistance.)
As it hit the hill, what speed did it have and what angle did its velocity make with the vertical?
What is the final angular velocity
A hotel elevator ascends 170m with a maximum speed of 4.4m/s. Its acceleration and deceleration both have a magnitude of 1m/s2.
A 60 kg person drops from rest a distance of 1.20m to a platform of negligible mass supported by a stiff spring. The platform drops 6cm before the person comes to rest.
A young boy swings a yo-yo horizontally above his head at an angular acceleration of 0.32 rad/s^2. If the tangential acceleration of the yo-yo at the end of the string is 0.15 m/s^2, how long is string.
A helicopter is ascending vertically with a speed of 5.57. At a height of 124 above the Earth, package is dropped from a window. How much time does it take for the package to reach the ground?
What is the size of the smallest vertical plane mirror in which a 10 tall giraffe standing erect can see her full-length image? (Hint: Locate the image by drawing a number of rays from giraffe's body that reflect off the mirror and go to her eye.
A radio station broadcasts at a frequency of 600,000 Hz. Know that radio waves have a speed of 3.00 x 10^8m/s, what is wavelength of these waves.
Determine the tension in each cable if boat has a mass of 490 kg and the angle of each cable is 50 degrees from the horizontal and the boat is being momentarily held at rest. Evaluate this to the tension when the boat is raised and held at rest so th..
The coefficients of friction for plastic on wood are μs = 0.50 and μk = 0.40. How much horizontal force would you want to apply to a 4.0-lb plastic calculator to start it moving from rest.
A school bus takes 0.89 h to reach the school from your house. If an average velocity of the bus is 21.1 km/h to the east, what is the displacement.
What is the frequency of ultrasound in a medium if he wave length is 3.0 x 10^-3 m and velocity is 1300 mm/ms.
A ball is held on an incline at the height of 72 cm. it is then released so that the ball rolls down the incline. At the bottom of the incline there is a loop where the ball rolls around in. If the loop is 62 cm high at its highest point what is the ..
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