Questions from College Physics

Q: When four people with a combined mass of 320 kg sit down

When four people with a combined mass of 320 kg sit down in a 2.0 x 103 - kg car, they find that their weight compresses the springs an additional 0.80 cm. (a) What is the effective force constant of...

Q: Explain why a dielectric increases the maximum operating voltage of a capacitor

Explain why a dielectric increases the maximum operating voltage of a capacitor even though the physical size of the capacitor doesn’t change.

Q: A flask made of Pyrex is calibrated at 20.0°

A flask made of Pyrex is calibrated at 20.0°C. It is filled to the 100-mL mark on the flask with 35.0°C acetone. (a) What is the volume of the acetone when both it and the flask cool to 20.0°C? (b) Wo...

Q: The position of an object connected to a spring varies with time

The position of an object connected to a spring varies with time according to the expression x = (5.2 cm) sin (8.0pt). Find (a) The period of this motion, (b) The frequency of the motion, (c) The ampl...

Q: A harmonic oscillator is described by the function x(t)

A harmonic oscillator is described by the function x(t) = (0.200 m) cos (0.350t). Find the oscillator’s (a) Maximum velocity and (b) Maximum acceleration. Find the oscillator’s (c) Position, (d) Veloc...

Q: A 326 - g object is attached to a spring and executes

A 326 - g object is attached to a spring and executes simple harmonic motion with a period of 0.250 s. If the total energy of the system is 5.83 J, find (a) The maximum speed of the object, (b) The fo...

Q: The force constant of a spring is 137 N/m.

The force constant of a spring is 137 N/m. Find the magnitude of the force required to (a) Compress the spring by 4.80 cm from its un-stretched length and (b) Stretch the spring by 7.36 cm from its un...

Q: An object executes simple harmonic motion with an amplitude A.

An object executes simple harmonic motion with an amplitude A. (a) At what values of its position does its speed equal half its maximum speed? (b) At what values of its position does its potential ene...

Q: A 2.00 - kg object on a frictionless horizontal track

A 2.00 - kg object on a frictionless horizontal track is attached to the end of a horizontal spring whose force constant is 5.00 N/m. The object is displaced 3.00 m to the right from its equilibrium p...

Q: A spring of negligible mass stretches 3.00 cm from its

A spring of negligible mass stretches 3.00 cm from its relaxed length when a force of 7.50 N is applied. A 0.500 - kg particle rests on a frictionless horizontal surface and is attached to the free en...