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2 years ago

7

Dave and Alex push on opposite ends of a car that has a mass of 875 kg. Dave pushes the car to the right with a force of 250 N,

and Alex pushes to the left with a force of 315 N. Assume there is no friction.
a. Draw a free-body diagram showing all the forces acting on the car.
b. What is the net force on the car in the x-direction?
c. What is the acceleration of the car?
d. What is the normal force acting on the car?

1 answer:

Veronika [31]2 years ago

7 0

B but im not so suree

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Two fun-loving otters are sliding toward each other on a muddy (and hence frictionless) horizontal surface. One of them, of mass

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(a). The magnitude and direction of the velocity of the otters after collision is 1.35 m/s toward left.

(b). The mechanical energy dissipates during this play is 226.98 J.

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Mass of other = 5.75 kg

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Using conservation of momentum

$m_{1}v_{1}+m_{2}v_{2}=(m_{1}+m_{2})v$

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Negative sign shows the direction of motion of the object after collision is toward left.

(b). We need to calculate the initial kinetic energy

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$K.E_{i}=\dfrac{1}{2}m_{1}v_{1}^2+\dfrac{1}{2}m_{2}v_{2}^2$

Put the value into the formula

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Using formula of loss of mechanical energy

$\Delta K.E=K.E_{f}-K.E_{i}$

Put the value into the formula

$\Delta K.E=12.98-239.96$

$\Delta K.E=-226.98\ J$

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(b). The mechanical energy dissipates during this play is 226.98 J.

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2 years ago

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Answer:

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$V_L=V_oe^{-\frac{Rt}{L}}$

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You first use properties of the logarithms to get time t, next, replace the values of the parameter:

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hence, after 1.6s the inductor will have a potential difference of 24V

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Answer:

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Answer:

$a=-3\ m/s^2$

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<u>Second Newton's Law</u>

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$F_n=m.a$

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