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4 years ago

As the distance between two objects decreases, what happens to the force of gravity between the two objects

Physics

1 answer:

KonstantinChe [14]4 years ago

3 0

The force of gravity between them increases.

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A horse travels 80 meters south in 20 seconds. What is its average velocity?

AURORKA [14]

Average velocity is a vector unit (i.e. includes magnitude and direction) calculated by working out distance ÷ time:

80 metres ÷ 20 seconds = 4 metres/seconds (m/s)

Therefore, your final answer is C. 4 m/s south.

7 0

3 years ago

A block of mass 5 kg is placed on a rough table having a coefficient of static friction μs = 0.2.What is the force required to m

just olya [345]

Answer:

We need to (at least) apply a force of 9.8 N to move the block

Explanation:

Second Newton's Law

If a net force $F_n$ different from zero is applied to an object of mass m, then it will move at an acceleration a, given by

$F_n=ma$

If we apply a force F to an object placed on a rough surface, the only way to make it move is to beat the friction force which is given by

$F_r=\mu F_N$

Where $\mu$ is the static friction coefficient and $F_N$ is the normal force exerted by the table to the object. Since there is no motion in the vertical direction the normal force equals the weight of the object:

$F_N=mg=5\ kg\ 9.8\ m/s^2=49\ N$

The friction force is

$F_r=0.2 (49)=9.8\ N$

Thus, we need to (at least) apply a force of 9.8 N to move the block

5 0

4 years ago

What determines color in the visible light region of the electromagnetic spectrum?

anyanavicka [17]

Answer:

In the electromagnetic spectrum, "Blue" is the "highest" frequency color of visible light.

Or In the electromagnetic spectrum, "Red" is the "Lowest" frequency color of visible light.

Hope this helps!

7 0

4 years ago

Radioactive materials are used in smoke detectors. as the smoke comes in-between the radioactive source and the sensor, an alarm

Mashutka [201]

Alpha particles are used in smoke detectors as the ionise the air particles

4 0

3 years ago

Read 2 more answers

A man of mass 80.0 kg stands on a platform of mass 40.0 kg. He pulls on a rope that is fastened to the platform and runs over a

Vesnalui [34]

Answer:F=648 N

Explanation:

Given

mass of man $m_1=80 kg$

mass of Platform $m_2=40 kg$

acceleration of system $a=1 m/s^2$

Let F be the force with which man pulls the rope which will also create a tension of F in rope

From Diagram

$2F-(m_1+m_2)g=(m_1+m_2)a$

$2F=(m_1+m_2)(g+a)$

$F=\frac{(m_1+m_2)(g+a)}{2}$

$F=\frac{(80+40)(9.8+1)}{2}$

$F=\frac{1296}{2}$

$F=648 N$

7 0

4 years ago