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2 years ago

How would you know if a force is acting on an object?

Physics

2 answers:

luda_lava [24]2 years ago

8 0

Answer:

When drawing free-body diagrams, each force is represented by an arrow (a vector). The size of the arrow shows the relative magnitude of the force, while the direction the arrow is pointing tells us in which direction the force is acting

Explanation:

Hope it helps!

Artemon [7]2 years ago

6 0

Answer:

microscope

Explanation:

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Skylar goes to a pumpkin patch and pick out a pumpkin that has a mass of 6000 grams how many kilograms is the pumpkin

Alex

1000g = 1kg
6000g =6000 × 1/1000
=6kg

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3 years ago

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A decrease in the magnitude of velocity is called

vagabundo [1.1K]

Any change in the speed or direction of motion is called "acceleration". You'll hear "deceleration" used for slowing down but that's not technically correct.

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3 years ago

According to the momentum principle, the change in momentum of an object equals the impulse, which depends on______

3241004551 [841]

Answer: The momentum principle depends on MASS and VELOCITY.

Explanation:

The momentum principle states that net force changes the the momentum of an object where momentum is the product of the MASS of the body and it's VELOCITY.

Thus, momentum = mass(kg) ×velocity( m/s)= kgm/s ( derived unit)

Also to determine the rate of change of momentum;

Mass=m, initial velocity =u, final velocity = V and time =t

Initial momentum = mu

Final momentum = mv

Change in momentum = mv - mu

= m( v- u)

Rate of change of momentum=

m( v -u)/t --> equation 1

But V = u + at

Hence, a = v -u/t

Substitute for v -u/ t in equation 1

F = Kma, where k is constant and has the value of 1.

Therefore F = ma

Newton is the SI unit if force. It is defined as the force which gives a mass of 1kg an acceleration of 1 m/s².

IMPULSE is defined as the change of momentum of a body (mv-mu) or the product of force and time.

Thus impulse = force × time = m (v-u)

The unit is Ns ( Newton seconds) which is the same as change in momentum.

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2 years ago

A 36,287 kg truck has a momentum of 907,175 kg • . What is the truck’s velocity?

Drupady [299]

Given:
m = 36,287 kg, the mass of the truck
P = 907,175 (kg-m)/s, the truck's momentum.

Let v = the truck's velocity.
By definition, the momentum is
P = m*v
Therefore
v = P/m
= (907175 (kg-m)/s) / (36287 kg)
= 25 m/s

Answer: 25 m/s

7 0

3 years ago

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Two masses hang below a massless meter stick. Mass 1 is located at the 10cm mark with a weight of 15kg, while mass 2 is located

yan [13]

Answer:43.33 cm mark

Explanation:

Given

mass 1 is located at the 10 cm mark with weight of 15 kg

mass 2 is located at 60 cm mark with weight of 30 kg

string should be attached between them to balance the system

so the distance between the the two masses is 50 cm

For system to be balance torque of both the weight must nullify each other

Let us suppose string is at a distance of x cm from 15 kg mass so 30 kg mass is at a distance of 50-x cm

Balancing torque

$15\times x-30\times (50-x)$

$x=\frac{100}{3}=33.33$

so string should be at a mark of 10+33.33=43.33 cm

7 0

3 years ago

How would you know if a force is acting on an object?​

How would you know if a force is acting on an object?