Other Physics Answers

the inisial and final velocity of a body are (12 + or - 0.2) and (20 + or - 0.3) . find change in velocity

In a road accident, a van of mass 1500 kg moving at a speed of 28m * s ^ - 1 ran into the back of a car of mass 900 kg moving in the same direction at a speed of 11m * s ^ - 1 . As a result of the impact, the car was pushed forward at a speed of 18m * s ^ - 1 .

a Calculate the velocity of the van immediately after the impact.

b Calculate:

i the loss of kinetic energy of the van, ii the gain of kinetic energy of the car,

iii the total change of kinetic energy of the two vehicles.

An air column, open at one end, vibrating in its fundamental mode. How long is that air column in wavelength?

1. A can is dropped from rest at a height of 40.0 m above ground. How much time does it spend in the bottom half of its fall?

Angelica is pulling her bag at an angle 30° with the horizontal to a distance of 5m . If she exerts a constant force of 50N in pulling her bag, how much work is done

The force F experienced by the charge Q=2c moving with the velocity V with a magnitude B is given by F=qv×B

Given

V= 2i+4j+6k

F=4i-20j+12k

What then is B

If Bx=By

if the mass of water filling bottle is 25g and the mass of oil filling the bottle is 20g. What is the density of the oil.

Problem 3:   Consider the definition of the work done by a force.

In which of the following situations is the term “work” being used in the context of the physics definition of work?

 Finally, after a lengthy repair, Devon’s car works.   A car skids to a stop, and the frictional force does work.   Jose works furiously to finish his term paper on time.   Marie works out at the gym.   Work was progressing smoothly at the construction site.   In order to lift a box, John has to perform positive work on the box.   As a rock falls to the ground, the gravitational force does work on the rock. 

A BODY HAS A MASS OF 15KG AND IT IS BEING PUSHED HORIZONTALLY WITH A FORCE OF 100N IF IT HAS A COEFFICIENT OF KINETIC FRICTION 0.3 THEN WHAT IS THE ACCELERATION OF THE BODY)

What can you conclude about the reliability of the human sense of touch for comparing temperature?