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2 years ago

Please Help!What is inertia? What does inertia depend on?

1 answer:

8 0

Inertia is that quantity which depends solely upon mass. The more mass, the more inertia. Momentum is another quantity in Physics which depends on both mass and speed.

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the weight of an object on the earths surface is 300N. when it is lifted to 3 times the height, its weight will become

emmainna [20.7K]

Answer:

The weight of the object when it is lifted to 3 times the height is 33. $\overline 3$ N

Explanation:

The given parameters are;

The weight of the object on Earth, W = 300 N

The initial position of the object = On the surface of the Earth

Therefore;

The distance with which the weight is measured = The radius of the Earth, R

By Newton's Law of Gravitation, we have;

$W = G \times \dfrac{M \times m}{R^2}$

Where;

W = 200 N

G = The universal gravitational constant

M = The mass of the Earth

m = The mass of the object

When the height of the object = 3 × R, the weight of the object, W₂, is given as follows;

$W_2 = G \times \dfrac{M \times m}{(3 \times R)^2} = \dfrac{1}{9} \times G \times \dfrac{M \times m}{ R^2} = \dfrac{1}{9} \times W = \dfrac{1}{9} \times 300 N = 33.\overline 3 \ N$

Therefore, the weight of the object at 3 times the height, W₂ = 33. $\overline 3$ N

6 0

3 years ago

Two people are standing on a 2.50-m-long platform, one at each end. The platform floats parallel to the ground on a cushion of a

trasher [3.6K]

Answer:

The platform move before coming to rest again 0.045 m far

Explanation:

Given

Ball is in motion

M (Platform mass + 2 people mass)

V (recoil velocity of the platform)

m (ball mass)

v (velocity ball)

MV + mv = 0

Distance of the platform movement is

t (time that the ball is in the air)

x = Vt

t = $\frac{L}{v - V}$

Knowing the platform and the ball are moving while the ball is in the air

x = $\frac{V}{v - V} * L$

Also knowing that

$\frac{V}{v} = \frac{-m}{M}$

This way,

x = $((\frac{V}{v}) * L) / (1 - \frac{V}{v})$ = $-\frac{m*L}{M + m} = -\frac{3.63 kg * 2.50 m}{198 kg + 3.63 kg} = -0.045 m$

The minus sign means the displacement of the platform is in opposite direction to the displacement of the ball.

6 0

3 years ago

The specific heat of water is 4.184 J g—1 K—1. A piece of iron (Fe) weighing 40 g is heated to 80EC and dropped into 100 g of wa

CaHeK987 [17]

Explanation:

Below is an attachment containing the solution.

5 0

3 years ago

A large truck is moving at 22.0 m/s. if its momentum is 125,000 kg • meters per second, what is the truck's mass? 176 kg 2750 kg

solong [7]

The mass of the large truck is determined as 5680 kg.

<h3>Mass of the truck</h3>

The mass of the truck is calculated as follows;

P = mv

where;

P is momentum
m is mass
v is velocity

m = P/v

m = 125000/22

m = 5680 kg

Thus, the mass of the large truck is determined as 5680 kg.

Learn more about momentum here: brainly.com/question/7538238

#SPJ1

7 0

1 year ago

Screws and wedges are modified blank

4vir4ik [10]

This is what I know
<span>Splitting securing A wedge is a triangular shaped tool, a compound and portable inclined plane, and one of the six classical simple machines. </span>

8 0

3 years ago