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Nuetrik [128]
3 years ago
10

You can apply a force of 80N to a cart, which is carrying textbooks from the library. The whole cart with the books has a mass o

f 60kg. If starting from rest, how much speed will the cart pick up after you push it for 6 seconds
Physics
1 answer:
Mashutka [201]3 years ago
3 0

F=ma

So

a = F/m

80/60

1.3ms^2

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A 0.150 kg stone rests on a frictionless, horizontal surface. A bullet of mass 9.50 g, traveling horizontally at 380 m/s, strike
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Answer:

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Direction=33.3 degree below the horizontal

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mu+ MU=mv+ MV

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3.61 i-2.375j=0.150V

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V=24.07i-15.83j

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=\sqrt{(24.07)^2+(-15.83)^2}

|V|=28.81 m/s

Hence, the magnitude and direction of the velocity of the stone after it is struck, |V|=28.81 m/s

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\theta=tan^{-1}(\frac{y}{x})

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\theta=tan^{-1}(-0.657)

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K_i=685.9 J

Final kinetic energy

K_f=\frac{1}{2}mv^2+\frac{1}{2}MV^2

=\frac{1}{2}(9.5\times 10^{-3})(250)^2+\frac{1}{2}(0.150)(28.81)^2

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Initial kinetic energy is not equal to final kinetic energy. Hence, the collision is not perfectly elastic collision.

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