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frez [133]
3 years ago
8

What is stopping distance of a body at 20 m/s is decelerated at 2m/s² to rest?​

Physics
1 answer:
AlladinOne [14]3 years ago
5 0

Answer:

s = 100 m

Explanation:

v² = u² + 2as

s = (v² - u²) / 2a

s = (0² - 20²) / 2(-2)

s = 100 m

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A solid block of mass m is suspended in a liquid by a thread. The density of the block is greater than that of the liquid. Initi
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Answer:

(C) T

The tension T at equilibrium will be equal to the Buoyant force.

The Buoyant force is given by:

Fb = density x acceleration due to gravity x volume displaced

The change in height doesn't affect the Buoyant force and hence the tension.

Note: The figure of question is added in the attachment

3 0
3 years ago
What will be the weight of a box, mass 10Kg on the surface of a hypothetical planet having mass double of Earth and the radius i
vlada-n [284]

Answer:

           W ’= 21.78 kg

Explanation:

The expression for weight is

          W = m g

let's look for the acceleration of gravity with the universal law of gravitation

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          F = m (G M / r2)

without comparing the two equations

          g’= G M / r2

in that case M = 2 Mo and r = 3 ro

where mo and ro are the mass and radius of the earth

         we substitute

         g ’= G 2Mo / (3r₀) 2

         G ’= 2/9 G Mo / r₀²

         g ’= 2/9 g

the weight of the body on this planet is

         W ’= m g’

          W ’= m 2/9 g

let's calculate

          W ’= 2/9 10 9.8

           W ’= 21.78 kg

3 0
3 years ago
a football player initially at rest accelerates uniformly as she runs down the field, travelling 17m (E) in 3.8s. What is her fi
ikadub [295]
X - Xo = 0.5(Vo +V)t

Xo cancels because it is 0 (she is at rest) 

17 = 0.5(0+V)3.8 

17 = 1.9V 

Final velocity is 8.94737 m/s 
6 0
3 years ago
What is the term used for the rate at which distance is traveled?
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Velocity

Hope this helps
7 0
4 years ago
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3 years ago
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