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3 years ago

Please help I need this question answered or I basically fail

Physics

1 answer:

eduard3 years ago

7 0

The net force acting on the sled is zero. It's in a state of dynamic equilibrium.

Its acceleration is zero, it's moving in a straight line, and its speed is not changing.

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In a plate glass factory, sheets of glass move along a conveyor belt at a speed of 15.0 cm/s. An automatic cutting tool descends

Leni [432]

Answer:

angle at which the cutter should be set = 32°

Explanation:

We are given;

Speed of conveyor belt; v1 = 15 cm/s

Width;w = 72 cm

Speed of the cutter that moves across the width; v2 = 24 cm/s

Let's calculate time;

Since the width and the rate at which the cutter works per seconds is given, thus;

Time = w/v2

Time = 72/24 = 3 seconds

Now, we know that, velocity = distance/time

Thus, distance = velocity x time

So, distance covered;d = 15 x 3 = 45 cm

Now, for us to calculate the angle the cutter should be set, we would treat it as a triangle.

When the cutter cuts it, it covers a distance d which is perpendicular to the width.

Thus, to calculate the angle made with the width, we'll use trigonometric ratio.

Thus, d/w = tan θ where θ is the angle at which the cutter should be set.

So, 45/72 = tan θ

tan θ = 0.625

θ = tan^(-1)0.625

θ = 32°

3 0

3 years ago

Famous scientists, who was credited with perfecting the telescope and saying there is another side to the moon?.

Black_prince [1.1K]

Answer:

Galileo di Vincenzo Bonaiuti de' Galilei

7 0

3 years ago

Is joules law and Ohm's law same thing or different? Please tell:

Zielflug [23.3K]

different because joules law talks about heat produce in an electric whiles ohm' law talks about potential difference

4 0

3 years ago

Determine the amount of potential energy of a 5.0Kg book that is moved to three different shelves on a bookcase. The height of e

rjkz [21]

Formula to find gravitational potential energy:
mgh
m: mass
g: gravitational acceleration
h: height (relative to reference level)

so the P.E. at 1.0.m is (5x9.8x1)= 49J
P.E. at 1.5m is (5x9.8x1.5) =73.5J
P.E. at 2.0m is (5x9.8x2)=98J

8 0

3 years ago

Why do heavier objects fall at the same speed as lighter ones?

GaryK [48]

Speed of any freely falling object is always same. Provided, both are left to fall from the same height. If you perform this experiment in a perfect vacuum or near vacuum laboratory, both of them will reach ground with same velocity this is because there is no resistance to their motion. This is always true no matter where you go and perform this experiment.
It can be easily proved from conservation of mechanical energy. Why conserving energy? because there are no forces acting on the freely falling objects other than conservative force(mg).

5 0

4 years ago