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marysya [2.9K]
3 years ago
15

16. A block is sitting on a ramp tilted from horizontal. The block is just about to slide. T he angle of the ramp relative to ho

rizontal is 14 degrees. What is the coefficient of friction between the block and the ramp? a. 0.25 b. 0.97 c. 0.5 d. 0.1 e. 0.34
Physics
1 answer:
Shalnov [3]3 years ago
5 0

Answer:

option A

Explanation:

given,

angle of inclination = 14°

block is resting on the inclined plane.

Let m be the mass of the block

vertical component of forces

∑F_y = 0

N_r - mg cos θ = 0

N_r = m g cos θ.............(1)

along the plane of slide

f_r = μ N_r

μ N_r = mg sin θ............(2)

dividing equation (2)/(1)

μ = tan 14°

μ = 0.25

correct answer is option A

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The drawing shows an object attached to an ideal spring, which is hanging from the ceiling. The unstrained length of the spring
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Image is missing so I have attached it.

Also, the options are missing and it is;

A) KE is has a maximum value at position 3. EPE has a maximum value at position 2. GPE has a maximum value at position 1.

B) KE is has a maximum value at position 1. EPE has a maximum value at position 2. GPE has a maximum value at position 3.

C) KE is has a maximum value at position 2. EPE has a maximum value at position 3. GPE has a maximum value at position 1.

D) KE is has a maximum value at position 1. EPE has a maximum value at position 3. GPE has a maximum value at position 2.

E) KE is has a maximum value at position 2. EPE has a maximum value at position 1. GPE has a maximum value at position 3.

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If an object vibrates about its mean position, under the influence of a restoring force, such that restoring force is directly proportional to the displacement from the mean position, the motion of the object is called simple harmonic motion. During Simple harmonic motion, the sum of Kinetic and potential energy remains constant.

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Thus,

Option C fulfills that and therefore will be the correct answer.

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