A 2.33 kg ball is dropped from a height of 3 m. The ball then bounces back upward a distance of 2.2 m. How much energy was lost in the collision with the ground?
50.2 J |
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18.3 J |
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68.5 J |
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118.7 J |
A 2.33 kg ball is dropped from a height of 3 m. The ball then bounces back upward a distance of 2.2 m. How much momentum does the ball have immediately after bouncing off the ground?
5.13 kg m/s |
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21.6 kg m/s |
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15.3 kg m/s |
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17.4 kg m/s |
A 2.33 kg ball is dropped from a height of 3 m. The ball then bounces back upward a distance of 2.2 m. What is the speed of the ball immediately after bouncing off the floor?
5.13 m/s |
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8.24 m/s |
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21.6 m/s |
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6.57 m/s |
A 2.33 kg ball is dropped from a height of 3 m. What is the magnitude of its momentum the moment before hitting the floor?
7.67 kg m/s |
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0 kg m/s |
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17.9 kg m/s |
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22.8 kg m/s |
A 2.33 kg ball is dropped from a height of 3 m. How fast is it going right before it strikes the ground?
7.67 m/s |
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22.9 m/s |
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0 m/s |
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29.4 m/s |
1.
Mass of ball,m=2.33 kg
Initial height,hi=3m
Final height,hf=2.2 m
Energy lost in the collision with the ground=mghi-mghf=2.339.8(3-2.2)=18.3 J
2.
Momentum of ball after bouncing off the ground=m(2ghf)1/2=2.33(29.82.2)1/2=15.3 kg m/s
3.
Speed of the ball immediately after bouncing off the floor=(2ghf)1/2=(29.82.2)1/2=6.57 m/s
4.
Magnitude of its momentum the moment before hitting the floor=m(2ghi)1/2=2.33(29.83)1/2=17.9 kg m/s
5.
Speed of the ball before it strikes the ground=(2ghi)1/2=(29.83)1/2=7.67 m/s
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