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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
3782 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...

SA
Answered by Sola A. Psychology tutor
42593 Views

Washing powder is sold in two sizes: Bag 1 is 600 grams for £3.30. Bag 2 is 1500 grams and usually costs £9.60 but currently has 15% off. Which is better value?

To determine which is better value, we need to determine the price per gram of each washing powder.
Bag 1:
For the 600g bag, this is done by dividing the price by the number of ...

JL
Answered by Joe L. Maths tutor
6326 Views

Describe the characteristics of oceanic crust. (AQA Past Paper, 3 marks)

There are two types of crust we need to know about: Oceanic crust and Continental crust. Oceanic crust is formed at mid ocean ridges where two plates pull apart. Here magma from the mantle upwells. When i...

KG
Answered by Katie G. Geography tutor
6701 Views

Where do electrons go in an atom?

Electrons are spread around the atom, in layers outside of the nucleus (which holds the protons and the neutrons). These layers are called shells. The innermost shell can only hold 2 electrons, the other ...

KB
Answered by Kathryn B. Chemistry tutor
3710 Views

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