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rosijanka [135]
3 years ago
14

Explain relative velocity briefly​

Physics
1 answer:
fomenos3 years ago
4 0

Answer:

Explanation:

Relative velocity is defined as the velocity of an object B in the rest frame of another object A.

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A long. 1.0 kg rope hangs from a support that breaks, causing the rope to fall, if the pull exceeds 43 N. A student team has bui
raketka [301]

Answer:

6.8 m/s2

Explanation:

Let g = 9.8 m/s2. The total weight of both the rope and the mouse-robot is

W = Mg + mg = 1*9.8 + 2*9.8 = 29.4 N

For the rope to fails, the robot must act a force on the rope with an additional magnitude of 43 - 29.4 = 13.6 N. This force is generated by the robot itself when it's pulling itself up at an acceleration of

a = F/m = 13.6 / 2 = 6.8 m/s2

So the minimum magnitude of the acceleration would be 6.8 m/s2 for the rope to fail

8 0
3 years ago
HELP ASAP!!!! Which of the following is an example of a hypothesis? A) What will happen if a sugar cube in boiling water? B) I t
Maurinko [17]

Answer:

C) If an ice cube is placed into a boiling water, then it will melt in less than 2 minutes.

Explanation:

7 0
3 years ago
Changing the food given to hamsters causes different weight gain. why is this hypothesis bad?
timama [110]
This is a bad hypothesis because it's a statement. It is a description of what occurs, not a question that you will experiment upon to find an answer whether or not something will or will not be true.
5 0
3 years ago
A toy rocket is launched straight up by using a spring. The rocket is initially pressed down on the spring so that the spring is
tigry1 [53]

Answer:

6.86 meters

Explanation:

Let the compression of the string be represented by x, and the height of projection of the toy rocket be represented by h.

So that;

x = 9 cm = 0.09 m

In its rest position (i.e before the launch), the spring has a stored potential energy which is given as;

PE = \frac{1}{2} Kx^{2}

    = \frac{1}{2} x 830 x (0.09)^{2}

    = 415 x 0.0081

    = 3.3615

The potential energy in the string = 3.36 Joules

Also,

PE = mgh

where: m is the mass, g is the gravitational force and h the height.

m = 50 g = 0.05 kg, g = 9.8 ms^{-2}

Thus,

PE = 0.05 x 9.8 x h

3.3615 = 0.05 x 9.8 x h

3.3615 = 0.49h

⇒ h = \frac{3.3615}{0.49}

      = 6.8602

The height of the toy rocket would be 6.86 meters.

4 0
3 years ago
Lighting is the movement of?
larisa [96]

Explanation:

Movement:refers to the changing in the lights whether it be a change in intensity, color or direction of origin.

5 0
2 years ago
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