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Mandarinka [93]
3 years ago
8

An object accelerates at 20 m/s2. By how much does the speed change in one

Physics
1 answer:
Thepotemich [5.8K]3 years ago
6 0

Answer:

A

Explanation:

2 seconds= 20m

20m/2=

10m

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Andrej [43]
The answer should be Mars. 
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Sandy is on a road trip. She leaves at 8:00 AM. It takes her 2 hours to drive 200 kilometers. She stops at a rest stop for half
lutik1710 [3]
The average velocity of Sandy is given by the total distance covered S divided by the total time taken t:
v= \frac{S}{t}

The total distance covered is
S=200 km+0+100 km=300 km
while the total time taken is 2 hours + half an hour (for the rest) + 1 hour and half, so
t=2h+0.5h+1.5 h=4 h
Therefore, the average velocity is 
v= \frac{S}{t}= \frac{300 km}{4 h}=75 km/h
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3 years ago
A small block with mass 0.0350 kgkg slides in a vertical circle of radius 0.550 mm on the inside of a circular track. During one
Lisa [10]

Answer:

 W_net = μ 5.58,   μ = 0.1     W_net = 0.558 J

Explanation:

The work is defined by the related

          W = F. d ​​= F d cos θ

where bold indicates vectors.

In the case, the work of the friction force on a circular surface is requested.

The expression for the friction force is

              fr = μ N

the friction force opposes the movement, therefore the angle is 180º and the cos 180 = -1

               W = - fr d

the path traveled half the length of the circle

               L = 2 π R

               d = L / 2

               d = π R

we substitute

                 W = - μ N d

Total work is initial to

                W_neto = - μ π R (N_b - N_a)

let's calculate

                W_net = - μ π 0.550 (0.670 - 3.90)

                W_net = μ 5.58

for the complete calculation it is necessary to know the friction coefficient, if we assume that μ = 0.1

                W_net = 0.1 5.58

                W_net = 0.558 J

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3 years ago
Which does not use a wheel and axle?
omeli [17]
A saw, because wheels and or axles are present in all of the other items. A saw is a wedge, this it does not contain axles or wheels.
4 0
4 years ago
What unit is defined to express a quantity as a result of a 1 m s2 acceleration of a 1 kg object?
Dafna11 [192]

The definition of a Newton (unit) is an expression of a quantity as a result of a 1 m/s^{2} object acceleration.

<h3>What is the SI newton unit?</h3>

The Standard International (SI) unit of force is the newton. The letter N is frequently used to shorten the phrase "newton" in physics and engineering documents. In the absence of any other forces, one newton is the force necessary to accelerate a mass of one kilogram at a pace of one meter per second squared.

<h3>What are the equivalents of a newton in terms of mass and acceleration?</h3>

One Newton is the amount of force required to accelerate one kilogram of mass one squared meter per second.

<h3>Is the newton a measure of force?</h3>

The newton, abbreviated N, is the SI unit of force. Base units that are pertinent to force are: The symbol for the length unit of a metre is m. the kilogram (kg), a unit of mass.

learn more about newton here

h<u>ttps://brainly.com/question/14606242</u>

#SPJ4

6 0
2 years ago
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