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Sliva [168]
3 years ago
14

A car has a mass of 2,000kg and is traveling at 28 meters per second what is the car's kinetic energy

Physics
1 answer:
timama [110]3 years ago
6 0

284000 joules

is the answer.

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Please help with this problem. Thank you.​
4vir4ik [10]

Answer:

Explanation:

F = mω²R

F = 15(2π/8.5)²(7.8)

F = 63.93044788...

F = 63.9 N

answer a) is the closest. No idea how they got a value that low unless they used a poor approximation for π.

4 0
3 years ago
Will the 79 kg skier in the figure below slide down if f the coefficient of static friction is 0.25?
mariarad [96]

Answer:

Man will not slide down

Explanation:

Given:

Coefficient of static friction = 0.25

Angle = 13°

Computation:

Man will slide down if

tan13° > Coefficient of static friction

Tan 13 = 0.23

So,

0.23 < 0.25

So,

Man will not slide down

4 0
3 years ago
How many orders of magnitude (powers of ten) is the distance to the moon greater than the distance across the Atlantic ocean?
kupik [55]

Answer:

The distance to the moon greater than the distance across the Atlantic ocean by an order of 1.

Explanation:

We have the average distance across the Atlantic ocean, d_i=3700\ mi

the average distance to the moon, d_m=238,900\ mi

The factor by which the distance to moon is greater than the width of Atlantic ocean:

f=\frac{d_m}{d_i}

f=\frac{238,900}{3700}

f=64.57

i.e.

the distance to the moon greater than the distance across the Atlantic ocean by an order of 1.

6 0
3 years ago
What is used to turn the pointer of a galvanometer?
Sever21 [200]

Answer:

b. an electric current is used to turn the pointer of a galvanometer

Explanation:

well , galvanometer is an important device which is used to detect an electric current through a conductor or circuit.

something special about it is that it can detect very minute current too

7 0
3 years ago
Read 2 more answers
A box of books weighing 325 N moves at a constant velocity across the floor when the box is pushed with a force of 425 N exerted
Mazyrski [523]

Answer:

Mu,k between the floor and the box is 0.609

Explanation:

given information:

weight of the book, W = 325 N

applied force, F = 425 N

angle, θ = 35.2°

to find the coefficient kinetic between the floor and the box, wee need to calculate the horizontal and vertical force.

first we calculate the vertical force, there are weight, normal force(N) and applied vertical force.

according to Newton's first law

ΣF = 0

ΣF_{y} = 0

W - N + F sin θ = 0

N = W + F sin θ

Next, we calculate the force in horizontal direction. applied force and friction force(F_{friction})

ΣF_{x} = 0

F cos θ - F_{friction} = 0

F cos θ - μk (W - F sin θ) = 0

μk =  (F cos θ) / (W + F sin θ)

    = (425 cos 35.2°)/(325+425 sin 35.2°)

    = 0.609

3 0
3 years ago
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