Physics Answers

what is the magnitude and direction of the electric field at .35m from a -6.5 x 10^-8 C point charge

A car is speeding up and has an instantaneous velocity of 1.0 m/s in the +x-direction when a stopwatch reads 10.0 s. It has a constant acceleration of 2.0 m/s² in the x-direction. (a) What change in speed occurs between t = 10.0 s and t = 12.0 s? (b) What is the speed when the stopwatch reads 12.0 s?

A car is speeding up and has an instantaneous velocity of 1.0 m/s in the +x-direction when a stopwatch reads 10.0 s. It has a constant acceleration of 2.0 m/s2 in the x-direction. (a) What change in speed occurs between t = 10.0 s and t = 12.0 s? (b) What is the speed when the stopwatch reads 12.0 s?

A charge of q = -5.3 nC is accelerated from rest through a potential

difference of 25 V. What is the change in electric potential energy of

the charge?

1. Two charges Q1 = +5 nC and Q2 = -7 nC are being separated

by 8 cm. Calculate the electric potential at point A. Refer to

the figure on the left.

2. A research Van de Graaff generator has a 2.50 mm diameter

sphere with a charge of 6.00 μC on it.

A. What is the potential near its surface?

B. At what distance from its center is the potential 1.50 MV?

Please put what letter you answered

A 5.0 kg box is being dragged with a rope. Find the magnitude of the tension necessary to keep the box moving at a constant velocity.

In the ideal setup shown, m₁ = 3.0 kg, m₂ = 2.5 kg.

a. What is the acceleration of the masses?

b. What is the tension in the string?

A moving airplane dropped a cargo (ignore the effect of air resistance). If the plane from which the cargo was dropped was flying at a height of 600 m, and the cargo lands 300 m horizontally from the initial dropping point,

a. how fast was the plane flying when the cargo was released?

b. what was the velocity of the cargo right before it hit the ground?

A proton (+q =+1.602 x 10^-19) moves along a straight line from point a to point b with a separation distance d = 0.50m. Considering the electric field along this line uniform magnitude of 1.50 x 10^7V/m and directed from point a to point b.

Determine:

a.) the force on the proton

b.) the work done on it by the field (in Joules & eV units)

c.) the potential difference (V ab)

A positive charge, q = +20 nC, is on the y-axis at y = +4.00 cm.

(a) Determine the magnitude and direction of the electric field at the origin.

(b) What will be the magnitude and direction of the electric field at the origin if the charge is -20 nC?