Top answers

A child of m1=48 kg, is initially standing at rest on a skateboard. The child jumps off the skateboard moving horizontally with a speed v1=1.2 ms^-1. The skateboard moves with a speed v2=16 ms^-1 in the opposite direction. Find the mass of the skateboard.

We approach this problem using the conservation of linear momentum, which tells us that m1 x v1 = m2 x v2. We substitute the values of m1, v1 and v2, and solve for m2: 48x1.2=m2x16; m2=57.6/16=3.6 kg.
AP
Answered by Alberto P. • Maths tutor
4350 Views

Explain the main features of Selye's General Adaptation Syndrome?

In 1936 Hans Selye developed his theory of the General Adaptation Syndrome (GAS), which is a stress model that explains the body's physiological response to stress. These stress responses are divided into th...
SA
Answered by Sola A. • Psychology tutor
44270 Views

What is the Le Chatelier's principle?

The Le Chatelier principle was estates that if there is a change in the conditions in a dynamic equilibrium system, the equilibrium of the system will move in order to counteract the change. The conditions t...
LA
3112 Views

Can you express 3 + 4j in polar form?

First, let's imagine the point 3 + 4j as a point on an Argand diagram, with coordinates 3,4. The polar form of an imaginary number is in the form re^(jθ), where r is the modulus of the number (the distance b...
WT
17861 Views

What is the difference between Serial and Parallel transmission of data?

Serial transmission is where bits are transmitted one at a time over a single channel, particularly used within USB devices. Parallel transmission is where bits are sent simultaneously over their own individ...
JL
Answered by Jay L. • Computing tutor
22371 Views