Other Physics Answers

A block system of tire pullings has an efficiency of 70%.Calculate, the effort that will be required to raise a load of 42.00N

A sinusoidal wave traveling in the positive x direction has an amplitude of 15.0 cm, a wavelength of 40.0 cm, and a frequency of 8.00 Hz. The vertical position of an element of the medium at t = 0 and x = 0 is also 15.0 cm, Determine the phase constant , and write a general expression for the wave function 

A 15-kg rock is dropped from rest on the earth and reaches the ground in 1.75s. When it is dropped from the same height on Saturn’s moon Enceladus, it reaches the ground in 18.6s. What is the acceleration due to gravity on Enceladus? 

A uniform bar of weight 250 newtons has a length of 6 meters. It is supported at the two ends. Where must a load of 300 newtons be placed so that the supporting force at the left end is twice that at the other end? What is the magnitude of each of the supporting forces?

Two point charges are placed as follows: charge q1 = -1.50 nC is at y = +6.00 m and charge 

q2 = +3.20 nC is at the origin. What is the total force (magnitude and direction) exerted by 

these two charges on a negative point charge q3 = -5.00 nC located at (2.00 m, -4.00 m)?

A capacitor consists of two square metal plates, each measuring 5.00 𝑥 10^−2m on a

side. In between the plates is a sheet of mica measuring 1. 00 𝑥 10^−4m thick.

(a) What is the capacitance of this capacitor? If the charge in one plate is

2. 00 𝑥 10^−8C.

(b) What is the potential difference and

(c) What is the electric field between the plates?

Given: Permittivity of Mica

(𝜖 = 4.8 𝑥 10^−11𝐶^2 / 𝑁. 𝑚^2)

A point charge of -6. 00𝑥10^−9C is 3.00m from point A and 5.00m from point B.

(a) Find the potential at point A and point B.

(b) How much work is done by the electric field in moving a 2.00 nC particle

from point A to point B?

A point particle is projected from the top of a hill 5m above sea level. It is projected with initial horizontal speed of 2m/s.

a. How far from the foot of the hill does it land?

b. How long does it take to hit the ground?

c. With what speed does it hit the ground?

d. With what velocity does it hit the ground?

The driver of a car travelling at 2m/s hits the brakes which provides a steady deceleration of 3m/s2 , how far does the vehicle travel before coming to rest?

A stone is thrown into a well 6m deep. The stone is thrown from rest. How

long will it take before you hear the stone hit the floor of the well. Assume

speed of sound is 2m/s (this is not the actual speed of sound, please!!)?