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what is the scape velocity?

It is the velocity necessary for a body to get rid of the gravitational attraction.
PA
Answered by Pablo A. • Physics tutor
3010 Views

When a force is applied to a spring, the spring extends by 12cm. The spring has a spring constant of 25 N/m. Calculate the force applied to the string in N.

The equation needed in this scenario is: Force Applied (F) = Spring Constant (k) x Extension (x). This will most likely be given to the student on the data sheet for most exam boards. Firstly, you must conve...
MG
Answered by Matthew G. • Physics tutor
14176 Views

What are vectors?

Vectors can seem complicated at first but they are simple once you understand that you need two pieces of information in order to define a vector. A vector is composed of direction and magnitude. You can thi...
EC
Answered by Esperanza C. • Physics tutor
7938 Views

A bat emits a sound wave with a frequency of 25.0 kHz and a wavelength of 0.0136 metres. Calculate the speed of this sound wave.

In this question you are given frequency and wavelength of the wave and you are asked for the speed. You need to use the formula on you sheet that uses these three properties : v = f x λ, where v is the spee...
LD
Answered by Libby D. • Physics tutor
18874 Views

If a ball of mass 5kg is dropped from rest, how far will it travel in the 3 seconds after it reaches 150m from it's original position? Write down the change in it's total energy after the 3 seconds. (ignoring air resistance)

Calculate the speed the ball is travelling at when it reaches 150m using v 2 = u 2 + 2ax. 2) Calculate the distance travelled in 3 seconds by an object with a speed of that found in 1) and an acceleration of...
DO
Answered by Dafydd O. • Physics tutor
2718 Views