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const2013 [10]
2 years ago
5

How is a magnetable to pick up bits of metal without actually touching them?

Physics
1 answer:
lisov135 [29]2 years ago
7 0

C.There is an invisible magnetic field around the magnet where it exerts magnetic force

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A horse running at 3 m/s speeds up with a constant acceleration of 5 m/s2. How fast is the
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Answer:

The horse is going at 12.72 m/s speed.

Explanation:

The initial speed of the horse (u) = 3 m/s

The acceleration of the horse (a)= 5 m/s^{2}

The displacement( it is assumed it is moving in a straight line)(s)= 15.3 m

Applying the second equation of motion to find out the time,

s=ut+\frac{1}{2}at^{2}

15.3=3t+2.5t^{2}

2.5t^{2}+3t-15.3=0

Solving this quadratic equation, we get time(t)=1.945 s, the other negative time is neglected.

Now applying first equation of motion, to find out the final velocity,

v=u+at

v=3+1.945*5

v=3+9.72

v=12.72 m/s

The horse travels at a speed of 12.72 m/s after covering the given distance.

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