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Q1. As part of an interview for the summer job with the Coast Guard, you are asked to help determine the search area for two sunken ships by calculating their velocity just after they collided. According to the last radio transmission from the 40,000 ton luxury liner, the Hedonist, it was going due west at a speed of 20 knots in calm seas during a rare fog just before it was struck broadside by the 60,000 ton freighter, the Ironhorse, which was travelling north at ten knots. The transmission also noted that when the freighter's bow pierced the hull of the liner, the two ships stuck together and sank together.
Q2. A 48.21 {rm kg} ice skater spins about the vertical axis through her body with her arms horizontally outstretched, making 2.20 turns each second. The distance from one hand to the other is 1.5 {rm m}. Biometric measurements indicate that each hand naturally makes up about 1.25 % of body weight.
W hat is the ratio of an amplitude of the damped oscillations
The impact on light fixture swing
A person who weighs 68 kg steps onto a spring scale in the bathroom, and spring compresses by 0.79cm. (a) what is the spring constant? (b) What is the weight of another person who compresses the spring by 0.34cm.
What least number of grooves is required for a grating
Find the energy, in joules, of one quantum of energy for an atomic oscillator in a block of aluminium.
A rifle with a barrel length of 58 fires an 11 bullet with a horizontal speed of 370. The bullet strikes a block of wood and penetrates to a depth of 15.
A cord of length 1.0m is fixed at both ends. Its mass per unit length is 1.2g/m and the tension is 11N. What is the frequency of fundamental oscillation
A rifle with a barrel length of 56 cm fires a 14 g bullet with a horizontal speed of 350 m/s/s. The bullet strikes a block of wood and penetrates to a depth of 13 cm.
A 110 kg mail bag hangs by a vertical rope 4.0 m long. A postal worker then displaces the bag to a position 2.0 m sideways from its original position, always keeping the rope taut. As the bag is moved to this position, how much work is completed by t..
Objective questions based on work, energy, power.
After the NEAR spacecraft passed Mathilde, on some occasion's rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid Eros, final destination for the mission.
Assume air resistance is negligible; from what height (in cm) above the compressed spring was the block dropped.
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