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3 years ago

How can you make two objects with different masses move the same distance

Physics

1 answer:

iVinArrow [24]3 years ago

4 0

Answer:

apply more energy to the object with more mass

Explanation:

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Which of the following statements accurately describes the sign of the work done on the box by the force of the push?

USPshnik [31]

Answer: positive

Explanation: according to newton's second law of motion, the applied force (pull) will produce a motion for the box defined by the formulae

f = ma, where m is the mass of the box and a is the acceleration.

But due to friction, a force of the same magnitude but opposite in direction to the push is applied, hence we have that

f - fr = ma

Where fr is the frictional force.

As we can see from the formulae, f (push) is responsible for a positive work while fr (friction) will bring about a negative work done.

4 0

3 years ago

A skateboarder starts up a 1.0-m-high, 30° ramp at a speed of 7.6 m/s . The skateboard wheels roll without friction. At the top,

andriy [413]

Answer:

t = 1.084 s

s = 8.25 m

Explanation:

given,

height from where skate board start (h) = 1 m

speed = 7.6 m/s

we know

v² = u² + 2 g h

v² =7.6² + 2×9.81× 1

v = 8.79 m/s

$v_y = v sin \theta$

$v_y =8.79\times sin 30^0$

$v_y = 4.39 m/s$

$s = s_o + v_y \times t +\dfrac{1}{2}at^2$

$0 = 1 + 4.39 \times t - 4.9 t^2$

t = 1.084 s

then horizontal distance

$s =v_x \times t$

$s = 8.79 \times cos 30^0 \times 1.084$

s = 8.25 m

5 0

3 years ago

A step down transformer has a primary coil consisting of 700 tons and a secondary coil consisting of 300 times. What is the pote

Pie

Answer is 47.14 v

by the relation

$\frac{V out}{V in } = \frac{N secondary}{N primary }$

6 0

3 years ago

The speed of sound at room temperature (20 degrees Celsius) is 343 m/s. If the speed of sound in air increases about 0.60 m/s fo

stepan [7]

Answer:

36,67 degrees Celsius

Explanation:

The simplest way to approach this problem, given the information provided, is to simply start with the speed difference.

Goal: 353 m/s

Start: 343 m/s (at 20 degrees Celsius).

Difference: 10 m/s

Variation rate: 0.60 m/s/d (d = degree)

$d = \frac{10 m/s}{0.60 m/s/d} = 16,67 d$

So, 16,67 degrees more than the starting point.

The temperature will then be 36.67 degrees Celsius, when the sound travels at the speed of 353 m/s.

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3 years ago

HELP NOWWW Studies based on which of the following were used to describe the current model of the atom?

alexgriva [62]

Well I know that ernest rutherford did the gold foil experiment where he fired alpha particles at gold foil. This experiment founded the nucleus but I don't know if the current model of the atom is based on this.

Cathode ray tube experiments sounds like its to do with electrolysis so i dont think it can be that.

6 0

3 years ago

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