Calculate the mechanical energy of the system if the mass of the coaster = 10 kg and g=10 m/s^2
mechanical energy = 10,000 J
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25
A toy car with kinetic energy of 72 J, moved at a speed of 6 m/s. Assuming the mass of the toy car remains the same, what will be its new kinetic energy if the speed is doubled to 12 m/s?
288 J
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10
Gravitational potential energy depends on ------ (Complete the statement)
height and mass of the object and the gravitational pull
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10
Formula for kinetic energy is ------- (Fill in the blanks)
(0.5) x mass x (square of the velocity)
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5
Give an example of an object that possesses elastic potential energy.
rubber band or string of the bow or a spring
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eraser
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gift
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fairy
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baam
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seesaw
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gold
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gift
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banana
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25
Calculate the energy stored in a ball of mass 500 g moving with a velocity of 8 m/s
mass = 0.5 kg, Kinetic energy = 16 J
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20
If 120J of work is done to displace a block by 60 m, calculate the force applied.
2 N
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25
A shopping cart with mass of 20 kg, has a kinetic energy of 90 J. Assuming the speed of the shopping cart remains the same, what will be its new kinetic energy if the mass is doubled to 40kg?
180 J
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15
An object is displaced by 2m when a force of 50 N is applied on it. Find the work done on the object.
100 J
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banana
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shark
Other team loses 25 points!
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rocket
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thief
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monster
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gift
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gift
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lifesaver
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25
Calculate the energy stored in a stone of mass 2 kg raised to a height of 5000 cm. (Take g = 10m/s^2)
height = 50 m, U = 1000 J
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10
Kinetic energy is possessed by an object when --------- (Complete the statement)
when it is in motion.
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10
Gravitational potential energy is possessed by an object when _____ (Complete the statement)