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3 years ago

Which would fall with greater acceleration in a vacuum a leaf or a stone?

2 answers:

3 0

Because its a vacuum, there's no air resistance, they will fall at same time
Applying gravity acceleration rule g=9.8m/s which is taken as 10m/s sometimes.

Mkey [24]3 years ago

3 0

Answer:

They will both have the same acceleration

Explanation:

Because its a vacuum, which ordinarily means it will be closed (unless otherwise stated), there will be no opposing forces (like air interference) to each of there acceleration due to gravity - each of them will have an acceleration due to gravity of 9.8 m/s2 (or approximately 10 m/s2) and will hit the "ground" at the same time if "dropped" at the same time.

Here, the masses will not be considered because there are no obstructions/opposing forces.

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The rate at which an object's velocity changes is called its

Flura [38]

Answer:

A. acceleration

Explanation:

Acceleration is the increase of motion, it is the rate at which an object changes its velocity.

4 0

4 years ago

Read 2 more answers

The human nervous system can propagate nerve impulses at about 102 m>s. Estimate the time it takes for a nerve impulse to tra

Olin [163]

Answer:

t = 0.196 s

Explanation:

The speed of a pulse is determined by the characteristics of the medium, its density and its resistance to stress, as long as these remain the speed will be constant for which we can use the kinetic expressions of the uniform movement

v = x / t

t = x / v

calculate

t = 2/102

t = 0.196 s

4 0

3 years ago

What kind of weather would an occuluded front likely bring

abruzzese [7]

An occluded front forms when a cold front catches up with a warm front. So it would bring Sun and warmth.

3 0

3 years ago

A 60kg bicyclist (including the bicycle) is pedaling to the

Fittoniya [83]

a) 4 forces

b) 186 N

c) 246 N

Explanation:

Let's count the forces acting on the bicylist:

1) Weight ( $W=mg$ ): this is the gravitational force exerted on the bicyclist by the Earth, which pulls the bicyclist towards the Earth's centre; so, this force acts downward (m = mass of the bicyclist, g = acceleration due to gravity)

2) Normal reaction (N): this is the reaction force exerted by the road on the bicyclist. This force acts vertically upward, and it balances the weight, so its magnitude is equal to the weight of the bicyclist, and its direction is opposite

3) Applied force ( $F_A$ ): this is the force exerted by the bicylicist to push the bike forward. Its direction is forward

4) Air drag ( $R$ ): this is the force exerted by the air on the bicyclist and resisting the motion of the bike; its direction is opposite to the motion of the bike, so it is in the backward direction

So, we have 4 forces in total.

Here we can find the net force on the bicyclist by using Newton's second law of motion, which states that the net force acting on a body is equal to the product between the mass of the body and its acceleration:

$F_{net}=ma$