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3 years ago

12

As the ball rolls down the ramp, there are changes in kinetic and potential energy. How much kinetic energy does the ball have w

hen it reaches point B?
A) 0J
B) 25J
C) 50J
D) 100J

2 answers:

Karo-lina-s [1.5K]3 years ago

7 0

the correct answer is C.) 50j

Trava [24]3 years ago

5 0

Answer: C. 50j

Explanation:

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On earth, two parts of a space probe weigh 14500 N and 4800 N. These parts are separated by a center-to-center distance of 18 m

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Answer:

$F = 1.489*10^{-7} N$

Explanation: Weight of space probes on earth is given by: $W= m*g$

W= weight of the object( in N)

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g=acceleration due to gravity(9.81 $\frac{m}{s^{2} }$ )

Therefore,

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Similarly,

$m_{2} = \frac{4800}{9.81}$

$m_{2} = 489.29 kg$

Now, considering these two parts as uniform spherical objects

Also, according to Superposition principle, gravitational net force experienced by an object is sum of all individual forces on the object.

Force between these two objects is given by:

$F = \frac{Gm_{1} m_{2}}{R^{2} }$

G= gravitational constant ( $6.67 * 10^{-11} m^{3} kg^{-1} s^{-2}$ )

$m_{1} , m_{2}$ = masses of the object

R= distance between their centres (in m)(18 m)

Substituiting all these values into the above formula

$F = 1.489*10^{-7} N$

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Answer:

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Explanation:

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By substituting the values, we get

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Use the formula for time of flight

$T = \frac{2uSin\theta }{g}$

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T = 1.61 second

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