Physics, 13.07.2019 21:20 ronaldo22

a trained sea lion slides from rest down a long
ramp into a pool of water. if the ramp is inclined at
an angle of 23° above the horizontal and the
coefficient of kinetic friction between the sea lion
and ramp is 0.26. calculate the acceleration of the
sea lion as it slides down the ramp.

Answers: 3

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Answers

Answer from: 5nathanomadrid5

The acceleration of the sea lion will be "1.484 m/s²".

Given:

Coefficient of Kinetic energy = 0.26

Angle = $23^{\circ}$

By using the Newton's second equation, we get

→ $mgSin \Theta-F_k = ma$

or,

→ $mgSin \Theta-\mu mg Cos \Theta =ma$

→ $g Sin \Theta-\mu g Cos \Theta =a$

hence,

The acceleration will be:

→ $a = 9.8 Sin 23^{\circ} - 0.26\times 9.8\times Cos23^{\circ}$

$= 1.484 \ m/s^2$

Thus the above response is correct.

Learn more about newton's law here:

link

Answer from: rachel2005smith

1.5 m/s²

Explanation:

Draw a free body diagram. There are three forces acting on the sea lion: gravity pulling down, normal force perpendicular to the ramp, and friction parallel to the ramp.

Sum of the forces perpendicular to the incline:

∑F = ma

N − mg cos θ = 0

N = mg cos θ

Sum of the forces parallel to the incline:

∑F = ma

mg sin θ − Nμ = ma

Substitute for N:

mg sin θ − (mg cos θ) μ = ma

g sin θ − g cos θ μ = a

a = g (sin θ − μ cos θ)

Given θ = 23° and μ = 0.26:

a = 9.8 (sin 23 − 0.26 cos 23)

a = 1.48

Rounded to two significant figures, the sea lion accelerates at 1.5 m/s².

Answer from: Quest

frequency or wavelenth of em radiation in a vacuum

Answer from: Quest

Is a vector quantity that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

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a trained sea lion slides from rest down a long
ramp into a pool of water. if the ramp is incli...

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