Other Physics Answers

A ball is thrown downward from the roof of a 24 m tall building with an initial speed of 5 m/s. (a) Use energy principles to find the speed with which the ball hits the ground. (b) Find the time it took the ball to reach the ground. (c) If the ball were thrown upwards from the roof with the same speed repeat the calculations for parts (a) and (b)

1. How much work is required to move a charge of 4nC from a point 2m away to a

point 0.5 m away from a point charge of 60nC? What is the potential difference

between these points?

2. An electron is accelerated from rest through a potential difference of 15V. What is the change in electric potential energy of the electron?

3. Two-point charges Q1 = 4.5 μC and Q2 = 8.5 μC are initially very far apart. They are then brought together, with a final separation of 3.5 mm. How much work does it take to bring them together?

4. A 0.500 cm diameter plastic sphere, used in a static electricity demonstration, has a uniformly distributed 40.0 pC charge on its surface. What is the potential near its surface?

3. If there were twice as much as charge on one of the charged objects near the charge sphere, would the electric potential energy of the object in the field of the charged sphere be the same or would it be twice s great? Would the electric potential of the object be the same or would it be twice as great?

2. Four charges. q, 5.00 x10'C. q-3.00 x C. q-2.00 x10°C. -6.00 x10 C, are situated at the corners of a square of side 4.00m. Find the potential at the center of the square?

1. A point charge of 3.0 nC with a mass of 4.0 g is moved from x-1.0m to x-1.5m in an electric field of 5.0 N/C with the same direction as the motion of the charge. (a) How much work is done on the charge by the electric force? (b) What is the change in the potential energy of the charge? (c) Assuming that the charge started from rest, what is its speed at x-1.5 m?

A ball of mass 625.g traveling 4.00 m/s to the right, has an elastic head-on collision with an identical ball which is at rest. Find the final velocity of each ball.

Four charges, q₁ =5.00 x10^-7C,   q₂ = -3.00 x^10-7 C,   q₃ = -2.00 x10^-7C,   q₄ = 6.00 x10^-7C, are situated at the corners of a square of side 4.00m. Find the potential at the center of the square?

A point charge of 3.0 nC with a mass of 4.0 g is moved from x=1.0m to x= 1.5m in an electric field of 5,0 N/C with the same direction as the motion of the charge. (a) How much work is done on the charge by the electric force? (b) What is the change in the potential energy of the charge? (c) Assuming that the charge started from rest, what is its speed at x=1.5 m?

Gray and Juvia casually vibe with each other at the bottom of a 42 m deep lake. It is 2.1°C where they currently are, and 23 °C at the surface. Find the ratio of the volume of one of Juvia’s air bubbles at her current depth to its volume when it reaches the surface.”.

How do you compute the force of attraction between a +1.60 × 10 C charge and a -2.09 × 10C charge if they are 4.01 × 10 m apart?