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alexandr1967 [171]
4 years ago
11

- An object changes speed from 50 m/s to 75 m/s in 10 s. What is its acceleration?

Physics
1 answer:
postnew [5]4 years ago
4 0

Answer:A

Explanation:

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Two blocks with masses M1 and M2 hang one under the other.
Anna35 [415]

Answer:

(a)T= M2 × g,    (b)T= (M1 + M2)g,   (c)T= M2 (a + g) and  (d)T=(M1 + M2) (a + g)

Explanation:

M1 is hanged upper and M2 is lower at Rest.

(a) For M2

T2 = Weight of the Body M2= M2 × g

(b) T1 = Weight of the Body M2 + Weight of the Body M2

T1 = M1 g + M2 g = (M1 + M2)g

M1 is hanged upper and M2 is lower at accelerated upwards ( F = T - W)

(c) For M2

⇒T = M2a + M2g = M2 (a + g)

(d) For M1

T = (M1 + M2) a + (M1 + M2) g

⇒ T = (M1 + M2) (a + g)

5 0
3 years ago
Read 2 more answers
When entering an expressway, in the acceleration lane you should: A search for a gap in traffic and adjust your speed to the spe
sattari [20]

Answer:A

Explanation: search for a gap in traffic and adjust your speed to the speed of the traffic.

3 0
3 years ago
If a mass of 76 kg acts downward 0.38 m from the axis of rotation on one end of a board and another force of 129 N also acts dow
Semenov [28]

Answer:

y = 2.196 m

Explanation:

Mass, m = 76 kg

distance from axis of rotation, x = 0.38 m

Second Force, F = 129 N

moment arm of the second force, y = ?

Now, equating moments for the equilibrium

So,

m g × x = F x y

76 x 0.38 x 9.81 = 129 x y

y = \dfrac{76\times 0.38\times 9.81}{129}

y = 2.196 m

Hence, the length of the moment arm is equal to 2.196 m.

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3 years ago
(forces and motion) in 2-3 sentences explain why velocity (or speed) is interesting
Mariulka [41]
‘velocity’ refers to how fast an object is moving ‘in a particular direction’. speed is only how fast something is moving and velocity is how fast something is moving AND the direction. (hope this helps)
6 0
3 years ago
Which of the following measurements involve a direction
insens350 [35]

Answer:

I think it is Velocity idk but does it hurt to try

8 0
3 years ago
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