NewtonEZ/ProjectileMotion.nez at master · jarednielson/NewtonEZ · GitHub

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{
	"Problems": [{
			"units": "m",
			"gravity": -9.8,
			"objects": [{

					"type": "rect",
					"centerX": 2.0,
					"centerY": "{1}",
					"mass": 5,
					"isDynamic": true,
					"angle": 0.0,
					"width": 2,
					"height": 2,
					"initialVelocity": [0,0],
					"forces":[0,0]
				},
				{
					"type": "rect",
					"centerX": 0.0,
					"centerY": 0.0,
					"mass": 10,
					"isDynamic": false,
					"angle": 0.0,
					"width": 50,
					"height": 5,
					"initialVelocity":[0,0] ,
					"forces": [0,0]

				}
			],
			"varVals": {
				"{1}": [8, 11]
			},
			"varValLabels": ["height"],
			"problemText": "A block falls from a height of %1 meters, how long does it take to hit the ground?",
			"displayWidgets": ["s=.5at^2"],
			"solvingFormulas": ["(function(a) { return Math.sqrt(a*2/9.8);})"],
			"inputWidgetUnits": ["sec"]
		},
		{
			"units": "m",
			"gravity": -9.8,
			"objects": [{
					"type": "circ",
					"centerX": 2.0,
					"centerY": "{1}",
					"mass": 5,
					"isDynamic": true,
					"angle": 0.0,
					"radius": 2,
					"initialVelocity": [0,"{2}"],
					"forces": [0,0],
					"color": [0, 0, 0]
				},
				{
					"type": "rect",
					"centerX": 0.0,
					"centerY": 0.0,
					"mass": 10,
					"isDynamic": false,
					"angle": 0.0,
					"width": 50,
					"height": 5,
					"initialVelocity":[0,0],
					"forces": [0,0],
					"color": [0, 0, 0]
				}
			],
			"varVals": {
				"{1}": [8, 11],
				"{2}": [4, 6]
			},
			"varValLabels": [
				 "Height",
				 "Initial Velocity"
				],
			"problemText": "A ball is thrown upwards from a height of %1 meters, with an initial y velocity Vy0 = +%2 m/sec how long does it take to hit the ground?",
			"displayWidgets": ["s=.5at^2 + V0t + H0", "Initial Velocity"],
			"solvingFormulas": ["(function(b, c) { return (-1 * b - Math.sqrt(b * b + 4 * 4.8 * c)) / -9.8;})"],
			"inputWidgetUnits": ["sec"]
		},
		{
			"units": "m",
			"gravity": -9.8,
			"objects": [{
					"type": "circ",
					"centerX": 2.0,
					"centerY": "{1}",
					"mass": 5,
					"isDynamic": true,
					"angle": 0.0,
					"radius": 2,
					"initialVelocity": ["{2}","{3}"],
					"forces": [0,0],
					"color": [0, 0, 0]
				},
				{
					"type": "rect",
					"centerX": 0.0,
					"centerY": 0.0,
					"mass": 10,
					"isDynamic": false,
					"angle": 0.0,
					"width": 50,
					"height": 5,
					"initialVelocity":[0,0],
					"forces": [0,0],
					"color": [0, 0, 0]
				}
			],
			"varVals": {
				"{1}": [8, 11],
				"{2}": [4, 6],
				"{3}": [4, 6]
			},
			"varValLabels": [
				 "Height",
				 "Initial X Velocity",
				 "Initial Y Velocity"
				],
			"problemText": "A ball is thrown from a height of %1 meters, with an initial x velocityy velocity Vy0 = +%3 m/sec how long does it take to hit the ground?",
			"displayWidgets": ["s=.5at^2 + V0t + H0", "Initial Velocity"],
			"solvingFormulas": ["(function(b, d, c) { return (-1 * b - Math.sqrt(b * b + 4 * 4.8 * c)) / -9.8;})"],
			"inputWidgetUnits": ["sec"]
		}
	]
}