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igor_vitrenko [27]

4 years ago

13

A 30 N block is being pulled along a horizontal surface with an acceleration of 6 m/s2 by a rope. The coefficient of kinetic fri

ction between the block and the surface is 0.5. What is the force applied by the rope?

1 answer:

nata0808 [166]4 years ago

6 0

Answer:

33N

Explanation:

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In a perfectly inelastic one-dimensional collision between two moving objects, what condition alone is necessary so that the fin

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What condition alone is necessary so that the final kinetic energy of the system is zero after the collision?

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5 0

2 years ago

Two long, parallel wires are attracted to each other by a force per unit length of 305 µN/m. One wire carries a current of 25.0

kykrilka [37]

To solve this problem we will use the concepts related to the electromagnetic force related to the bases founded by Coulumb, the mathematical expression is the following as a function of force per unit area:

$\frac{F}{L} = \frac{kl_1l_2}{d}$

Here,

F = Force

L = Length

k = Coulomb constant

I =Each current

d = Distance

Force of the wire one which is located along the line y to 0.47m is $305*10^{-6}N/m$ then we have

$l_2 = \frac{F}{L} (\frac{d}{kl_1})$

$l_2 = (305*10^{-6}N/m)(\frac{0.470m}{(2*10^{-7})(25A))})$

$l_2 = 28.67A$

Considering the B is zero at

$y = y_1$

$\frac{kI_2}{2\pi y} =\frac{kI_1}{2\pi y_1}$

$\frac{(4\pi*10^{-7})(28.67)}{2\pi (y_1)} = \frac{(4\pi *10^{-7})(25)}{2\pi (0.47-y_1)}$

$y_1 = 0.25m$

Therefore the value of y for the line in the plane of the two wires along which the total B is zero is 0.25m

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4 years ago

Will isabella be able to spray ferdinand if the water is flowing out of the hose at a constant speed v0 of 3. 5 meters per secon

puteri [66]

Answer: 30

Explanation: it is 30 meters per seconds

5 0

2 years ago

How long will it take to travel 200 km traveling 10 m/s ?

asambeis [7]

There are 1,000m in a km, so 200km is 200,000m

200,000m/10m/s = 20,000s

3 0

3 years ago

A motorcyclist travelling at 30m/s starts to apply his brake when he is 50m from the traffic light that has just turned red .if

Marat540 [252]

Answer:

9m/s²

Explanation:

Given parameters:

Initial velocity = 30m/s

Final velocity = 0m/s

Distance traveled = 50m

Unknown:

Deceleration = ?

Solution:

To solve this problem, we apply the proper motion equation;

V² = U² + 2aS

V is the final velocity

U is the initial velocity

a is the acceleration

S is the distance

Insert the parameters and solve;

0² = 30² + 2(a)50

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The motorcycle decelerates at a rate of 9m/s²

3 0

3 years ago