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Question: Why do gymnasts use floor mats that are very thick?
Why does a baseball catcher's mitt have more padding than a conventional glove?
You have a friend who says that after a golf ball collides with a bowling ball at rest, although the speed gained by the bowling ball is very small, its momentum exceeds the initial momentum of the golf ball. Your friend further asserts this is related to the "negative" momentum of the golf ball after collision. Another friend says this is hogwash-that momentum conservation would be violated. Which friend do you agree with?
Explain how "elastic potential energy" dramatically changed the sport of pole vaulting when flexible fiberglass poles replaced stiffer wooden poles.
Suppose that you and two classmates are discussing the design of a roller coaster. One classmate says that each summit must be lower than the previous one. Your other classmate says this is nonsense, for as long as the first one is the highest, it doesn't matter what height the others are. What do you say?
An inefficient machine is said to "waste energy." Does this mean that energy is actually lost? Explain.
Please answer each question in at least 500 words
A bus with 50 passengers of a total mass 4 tons vibrates with a frequency of 0.8 Hz when going over a bump. Find mass of the bus if it when suspension has spring constant 3x105 N/m.
Define the velocity and the potential energy of an object briefly.
A 2.0 kg object moving with a velocity of +6.0 m/s collides with a 6.0 kg object that is initially at rest. Find the energy lost in the collision.
A certain conductor has 7.80*1028 free electrons per cubic meter, across-sectional area of 4.00 multiplied by 10-6 m2, and carries a current of3.50 A. Discover the drift speed of the electrons in the conductor
A charged capacitor is connected to an inductor. At time t = 0 the charge on the capacitor is Q = 6 %u03BCC. find the amplitude of the current at that same instant
A circuit contains six 240 ohm lamps with 60 W bulbs and a 10 ohm heater connected in parallel. the voltage across the circuit is 120 V. If the circuit has a fuse rated at 12 A, would it melt if everything is on.
a railroad car containing explosive material is initially traveling south at a speed of 4.9 ms on level ground. the
Starting from rest, an elevator has a constant acceleration of 0.621 m/s2 for a period of 6.25 sec., find the displacement of the elevator
What is the speed of the arrow as it leaves the bow.
A simple harmonic oscillator has an amplitude of 3.5cm and a max speed of 28cm/s. What is its speed when the displacement is 1.75cm
A 1.0cm x 1.0cm parallel-plate capacitor has 3.0 mm spacing. The electric field strength inside the capacitor is 1.4x105 V/m. What is the potential difference across the capacitor
The rectangular loop in the drawing consists of 75 turns and carries a current of I = 4.9 A. compute the magnitude of the net torque exerted on the loop
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