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3 years ago

If the acceleration of a moving object is zero, which of the following best describes its motion

Physics

2 answers:

podryga [215]3 years ago

7 0

If the acceleration of a moving object is zero, the object remains at a constant speed (without friction)

Morgarella [4.7K]3 years ago

3 0

Answer:

Explanation:

According to the newton's second law, the force exerted on an object is equal to the product of the mass of the body and the acceleration of the body.

F = m x a

Where, F is the force and a be the acceleration and m be the mass of the body.

Acceleration is defined as the rate of change of velocity of the body.

As acceleration is zero, so

a = 0

v - u = 0

Where, v is the final velocity of the body and u be the initial velocity of the body.

It means the body is moving with uniform velocity.

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kompoz [17]

Work = (force) x (distance)

Work = (22 N) x (16 m)

<em>Work = 352 Joules</em>

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3 years ago

Nathan drops marbles down two ramps that have different lengths. It takes the marbles 10 seconds to reach the bottom of both ram

Sonbull [250]

<h2><u>Full Question:</u></h2>

Nathan drops marbles down two ramps that have different lengths. It takes the marbles 10 seconds to reach the bottom of both ramps.Which statement is TRUE?

answer choices

Marble 1 has a faster speed than Marble 2.

Marble 2 has a faster speed than Marble 1.

Both the marbles travel at the same speed.

There is not enough data to compare the speeds of marbles.

<h2><u>Answer:</u></h2>

Marble 2 has a faster speed than Marble 1.

Option B.

<h3><u>Explanation:</u></h3>

The speed is defined as the distance covered per unit time. Here in the question, 2 balls cover equal distances in same time.

Time taken by the ball = 10 seconds.

Distance covered by 1st ball = 20 cm.

Distance covered by 2nd ball = 3cm.

So speed of the 1st ball = 2cm/sec.

Speed of the 2nd ball = 3 cm /sec.

So,it's very much evident that speed of 2nd Marble is much higher than the speed of the 1st marble.

5 0

3 years ago

The overhang beam is subjected to the uniform distributed load having an intensity of w = 50 kn/m. determine the maximum shear s

alex41 [277]

Given:

Uniform distributed load with an intensity of W = 50 kN / m on an overhang beam.

We need to determine the maximum shear stress developed in the beam:

τ = F/A

Assuming the area of the beam is 100 m^2 with a length of 10 m.

τ = F/A
τ = W/l
τ = 50kN/m / 10 m
τ = 5kN/m^2
τ = 5000 N/ m^2<span />

8 0

4 years ago

A 3250-kg aircraft takes 12.5 min to achieve its cruising

scoundrel [369]

Answer:

effeciency n = = 49%

Explanation:

given data:

mass of aircraft 3250 kg

power P = 1500 hp = 1118549.81 watt

time = 12.5 min

h = 10 km = 10,000 m