From aaa4573da8aac14a16dca1d1075d4c5252aef06c Mon Sep 17 00:00:00 2001
From: lee <lee-dasilva@hotmail.com>
Date: Thu, 4 Jun 2020 11:17:48 +0100
Subject: [PATCH] physics exercise js

---
 js/tests/physics_test.js | 15 +++++++++++++++
 subjects/physics.en.md   | 41 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 56 insertions(+)
 create mode 100644 js/tests/physics_test.js
 create mode 100644 subjects/physics.en.md

diff --git a/js/tests/physics_test.js b/js/tests/physics_test.js
new file mode 100644
index 00000000..2f861865
--- /dev/null
+++ b/js/tests/physics_test.js
@@ -0,0 +1,15 @@
+export const tests = []
+const t = (f) => tests.push(f)
+
+t(({ eq }) => eq(getAcceleration({}), 'impossible'))
+t(({ eq }) => eq(getAcceleration({ d: 10, f: 2, Δv: 100 }), 'impossible'))
+t(({ eq }) => eq(getAcceleration({ f: 10, Δv: 100 }), 'impossible'))
+t(({ eq }) => eq(getAcceleration({ f: 10, m: 5 }), 2))
+t(({ eq }) => eq(getAcceleration({ f: 10, m: 5, Δv: 100, Δt: 50 }), 2))
+t(({ eq }) => eq(getAcceleration({ Δv: 100, Δt: 50 }), 2))
+t(({ eq }) => eq(getAcceleration({ f: 10, Δv: 100, Δt: 50 }), 2))
+t(({ eq }) => eq(getAcceleration({ f: 10, m: 5, Δt: 100 }), 2))
+t(({ eq }) => eq(getAcceleration({ d: 10, t: 2, Δv: 100 }), 5))
+t(({ eq }) => eq(getAcceleration({ d: 100, t: 2, f: 100 }), 50))
+
+Object.freeze(tests)
diff --git a/subjects/physics.en.md b/subjects/physics.en.md
new file mode 100644
index 00000000..0c266168
--- /dev/null
+++ b/subjects/physics.en.md
@@ -0,0 +1,41 @@
+## physics
+
+### Instructions
+
+Isaac Newton has forgotten his laws of physics and needs your help to animate an object on his game.
+He must use the Second Law of Motion that states, when the forces acting on an object are unbalanced, the object will accelerate.
+This acceleration is dependent upon the force that act upon the object and the object's mass.
+
+So he wants to know for an object with :
+
+- mass of xx
+- Δv of xx
+- Δt of xx
+- force of xx
+- distance xx
+- time xx
+
+whats the acceleration of that object.
+Create a function called `getAcceleration` that given an object with the values of `{ f: 10, m: 5, Δv: 100, Δt: 50, t:1, d: 10 }`
+it must calculate the acceleration. If its not possible to calculate it you must print `impossible`
+
+### Formulas
+
+```
+a = F/m
+a = Δv/Δt
+a = 2d/t^2
+
+a = acceleration
+F = force
+Δv = final velocity - initial velocity
+Δt = final time - initial time
+d = distance
+t = time
+```
+
+### Quote
+
+Truth is ever to be found in simplicity, and not in the multiplicity and confusion of things
+
+Isaac Newton