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shusha [124]
3 years ago
13

This is an opinion question but

Physics
1 answer:
skad [1K]3 years ago
8 0
AJAJAJAJ I just going to say what ever I think it is important because imagine you see a rock and think is a normal rock but it ends up being really rare and you can make a lot of money out of it
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A sled and its rider are moving at a speed of 4.0 m/s along a horizontal stretch of snow. The snow exerts a kinetic frictional f
ehidna [41]

Answer:

The acceleration of the sled is "0.49 m/s²". A further explanation is given below.

Explanation:

The given values are,

Speed,

V = 4.0 m/s

Coefficient of kinetic friction,

μ = 0.05

As we know,

⇒  F \mu=\mu mg

and,

⇒  a = \mu g

On substituting the given values, we get

⇒     =0.0 5\times 9.8

⇒     =0.49 \ m/s^2

5 0
3 years ago
Carole is very tired and makes coffee. why would newton say that she must use her hand to put up the cup
Marat540 [252]
<span>newton say that she must use her hand to put up the cup because the work is equal to force times it distance, that is in the same direction of the force applied. if carole used her hand to put up the cup, then he is not applying any work because the displacement is not in the same direction of the force</span>
5 0
3 years ago
Read 2 more answers
If the velocity of a car is 45 km/h west how far can it travel in 0.5 hours?
marissa [1.9K]

Answer: 22.5 km

Explanation: Solution:

v=d/t

Derive to find d

d= vt

= 45 km/h x 0.5 h

= 22.5 km

Cancel hours and the remaining unit is in km.

6 0
3 years ago
A drum rotates around its central axis at an angular velocity of 19.8 rad/s. If the drum then slows at a constant rate of 3.02 r
Debora [2.8K]

a) Time taken =6.39 s

b) Angle of rotation while coming to rest = 188.17 rad

<u>Explanation:</u>

Initial angular velocity of the drum \omega_{0} = 19.8 rad/s^{2}

Angular acceleration of the drum \alpha = -3.02 rad/s^{2}

a.) We know that

\omega =\omega_{0} + \alpha  t

0 =  19.8 - 3.02 t

t = \frac{19.8}{3.02}

t = 6.39s

b.) we know that

\theta = \omega_{0} t + \frac{1}{2} \alpha   t^{2}

\theta = 19.8 \times 6.39 + \frac{1}{2} \times 3.02 \times 6.39^{2}

\theta =188.17 rad

3 0
4 years ago
In the ballistic pendulum experiment (A.K.A conservation of momentum &amp; energy), the velocity of the projectile was measured
Fed [463]

Answer: The combined velocity = 0.413m/a

Maximum angle Ø = 54.7

Explanation: Please find the attached files for the solution

4 0
3 years ago
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