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nadezda [96]
3 years ago
9

A person uses their hand to lift a 0.05-kg guniea pig from the ground at a constand speed.What is the force applied by the perso

n on the guinea pig? What is the net force on the guinea pig?
Physics
1 answer:
Ostrovityanka [42]3 years ago
3 0
The animal's weight is

                         (mass) x (gravity)

                 =      (0.05 kg) x (9.8 m/s²)  =  0.49 newton.

That's the minimum force you can use to pick it up.

That's the force applied by the person to pick up the pig
at a nice gentle constant speed.

Then the net force on the pig is zero.  The upward and downward
forces add up to zero, and that's why the animal is moving at a
constant speed, and not accelerating up or down.
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With the switch open, roughly what must be the resistance of the resistor on the right for the current out of the battery to be
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Answer:

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If the briefcase hits the water 6.0 s later, what was the speed at which the helicopter was ascending?
vovikov84 [41]

Complete Question

In an action movie, the villain is rescued from the ocean by grabbing onto the ladder hanging from a helicopter. He is so intent on gripping the ladder that he lets go of his briefcase of counterfeit money when he is 130 m above the water. If the briefcase hits the water 6.0 s later, what was the speed at which the helicopter was ascending?

Answer:

The speed of the helicopter is u  =  7.73 \  m/s

Explanation:

From the question we are told that

   The height at which he let go of the brief case is  h =  130 m  

    The  time taken before the the brief case hits the water is  t =  6 s

Generally the initial speed of the  briefcase (Which also the speed of the helicopter )before the man let go of it is  mathematically evaluated using kinematic equation as

      s = h+  u t +  0.5 gt^2

Here s  is the distance covered by the bag at sea level which is zero

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=>    0 = 130+  u * (6) +  0.5  *  (-9.8) * (6)^2

=>   u  =  \frac{-130 +  (0.5 * 9.8 *  6^2) }{6}

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soil i think is this from apex?

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