Other Physics Answers

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

A 3.5kg block is pushed along a horizontal floor by a force F of magnitude 15N at an angle 40°W horizontal. The coefficient of kinetic friction between the block and the floor is 0.25. Calculate the magnitude of:

(a) frictional force on the block from the floor

(b) the block's acceleration

A drum rotates around its central axis at an angular velocity of 12.60 rad/s. If the drum then slows at a constant rate of 4.20 rad/s2.

(a) how much time does it take?

(b) through what angle does it rotate in coming to rest (3.0s , 18.9 rad)

A different car accelerative from 0.12 m/s to 0. 52 meter per second that celebration of the car was 0.0 40 m/s squared the work done to accelerate the car was 0.48 joules

calculate the resultant force force needed to accelerate the car explain why the car has a maximum speed

A simple pendulum has a period of 2 seconds and is operated in a lift on Earth.what will happen to it's period;

When the lift ascending at uniform velocity

A 50g arrow moving at 20m/s strikes a pumpkin and drills a 35cm hole straight through it. When it emerges, the arrow has a speed of 8m/s. Assume uniform deceleration, find the time taken by the arrow to pass through the pumpkin.

Suppose there is an isolated charge A B

(+1.5𝑥10−19𝐶) that is displaced from point

A to B due to the electric force. As the

charge moves, it produces an electric field

which has a magnitude of 6.9 N/C. Find

the work done by the electric force of the

charge if it moves 1.5 m from its original

position.

If the 0.100-mm-diameter tungsten filament in a light bulb is to have a resistance of 0.300 \OmegaΩ at 20.0 ^o

o

C , how long should it be?

A 14-gauge copper wire has a diameter of 1.628 mm. What magnitude current flows when the drift velocity is 1.00 mm/s?

What is the resistance of a 25.0-m-long piece of 12-gauge copper wire having a 2.053-mm diameter?