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3 years ago

If an object is accelerating, can the net force acting on it be zero?

Physics

2 answers:

kaheart [24]3 years ago

8 0

No, because if the net force were 0, it would either be at rest or moving in constant velocity.

Ulleksa [173]3 years ago

5 0

Answer:

No, the net force cannot be zero.

Explanation:

From newton's second law,

ΣFnet = ma

Since a is accelerating I.e it is change velocity with respect to time taken, since acceleration can only occur when the force acting on the body is not balanced.

Then Fnet cannot be zero.

Now, if Fnet is zero

Fnet = ma=0

It shows that, the acceleration is zero. So since the body is accelerating, then the net force can not be zero

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Vsevolod [243]

Answer:

False

Explanation:

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3 years ago

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A 12.0 kg rock slides off the edge of a bridge and falls into the water 25.0 meters below. what is the kinetic energy of the roc

Pavel [41]

During the fall, all the initial potential energy of the rock
$U=mgh$
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where h is the initial height of the rock, m its mass, and v its velocity just before hitting the water. So, for energy conservation, we have
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3 years ago

A 1500 kg car is moving at 15m/s what is the impulse experienced by the car

denpristay [2]

Answer:

22500 Ns

Explanation:

Given,

Mass ( m ) = 1500 kg

Velocity ( v ) = 15 m/s

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Impulse = mv

Impulse

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Therefore,

22500 Ns is the impulse experienced by the car.

Note : -

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2 years ago

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A mass m is placed at the rim of a frictionless

olchik [2.2K]

Answer:

Explanation:

at collision, m has a velocity of √2gR

The center of mass of the system has a velocity of

m(√2gR) + 3m(0) = (m + 3m)v

v = ¼√2gR

The stationary mass (3m) will depart at twice the system center of mass velocity

v(3m) = ½√2gR ANSWER B

The relative velocity before the collision will be the negative of the relative velocity after the collision.

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3 years ago

What are the characteristics of density

BlackZzzverrR [31]

Density is the mass per unit volume of a substance and is simply the ratio of mass to volume. Unlike mass, density is a characteristic property of a material, meaning a property that has the same value for any size sample of a given substance.

Hope this helps:)

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3 years ago