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3 years ago

What does it mean if the slope is zero?

1 answer:

5 0

The object is not moving.

My explanation is that say if you sit a ball on the table and it is a smooth surface with no bumps or anything. The ball will sit still since it can’t roll unless you hit it.

Hope this helps!

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In this problem, you will analyze a system composed of two blocks, 1 and 2, of respective masses m1 and m2. To simplify the anal

Dafna1 [17]

Answer:

a) p = m1 v1 + m2 v2 , b) dp / dt = m1 a1 + m2 a2 , c) It is equivalent to force

dp / dt = 0

Explanation:

In this problem we have two blocks and the system is formed by the two bodies.

Part A. Initially they ask us to find the moment of the whole system

p = m1 v1 + m2 v2

Part B.

Find the derivative

dp / dt = m1 dv1dt + m2 dv2 / dt

dp / dt = m1 a1 + m2 a2

Part C.

Let's analyze the dimensions

m a = [kg] [m / s2] = [N]

It is equivalent to force

Part d

Acceleration is due to a net force applied

Part e

The acceleration of block 1 is due to the force exerted by block 2 during the moment change

Part f

Force of block 1 on block 2

True f12 = m1a1 f21 = m2a2

Part g

By the law of action and reaction are equal magnitude F12 = f21

Part H

dp / dt = 0

Isolated system F12 = F21 and the masses are constant. The total moment is only redistributed

7 0

3 years ago

ASAP

ElenaW [278]

Answer:

A. :D

Explanation:

3 0

3 years ago

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

Sergeu [11.5K]

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.

3 0

3 years ago

Read 2 more answers

When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees

Naya [18.7K]

Answer:

a) F = 1.26 10⁵ N, b) F = 2.255 10³ N, c) F_ {soil} = 3078 N

Explanation:

For this exercise we will use the relationship between momentum and moment

I = Δp

F t = p_f -p₀

a) with stiff legs, final speed is zero, initial velocity is down

Ft = 0-p₀

F = m v / t

let's calculate

F = 84.0 6.82 / 4.56 10⁻³

F = 1.26 10⁵ N

b) bending the legs

let's calculate

F = 84.0 6.82 / 0.254

F = 2.255 10³ N

c) It is requested to calculate the force of the ground on the man

∑ F = F_soil -W

F_soil = F + W

F_ {soil} = 2.255 103 + 84 9.8

F_ {soil} = 3078 N

3 0

3 years ago

A ball undergoes uniform acceleration of 2.50 m/s2 (beginning at rest). How far does the ball travel during that 4s time interva

-Dominant- [34]

Answer:

The ball travels a distance of 20 m in the time interval of 4 s

Explanation:

Using s = ut + 1/2at² where s = distance travelled by the ball, u = initial velocity of ball = 0 m/s (since it starts from rest), a = acceleration of the ball = 2.50 m/s² and t = time = 4 s.

Substituting the variables into the equation, we have

s = ut + 1/2at²

s = 0 × 4 s + 1/2 × 2.50 m/s² × (4 s)²

s = 0 + 1/2 × 2.50 m/s² × 16 s²

s = 1/2 × 40 m

s = 20 m

So, the ball travels a distance of 20 m in the time interval of 4 s.

4 0

4 years ago