3 years ago

A 6kg rock rolls down a hill with a momentum of 12kg m/s . Work out the velocity of the rock

Physics

2 answers:

Feliz [49]3 years ago

8 0

Answer:

Momentum= mass x velocity

So velocity= Momentum/mass= 12/6= 2m/s

Nat2105 [25]3 years ago

7 0

Answer:

if you need to get the work=force×displacement or if you need the velocity=displacement÷time taken

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3 years ago

The sensitivity of a measuring instrument is the value of the smallest quantity that can be read or estimated with it. What is t

nirvana33 [79]

Answer:

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4 years ago

What will a spring scale read for the weight of a 57.0-kg woman in an elevator that moves upward with constant speed of 5.0 m/s

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3 years ago

A silver wire with resistivity 1.59 × 10-8 Ω-m carries a current density of 4.0 A/mm2, What is the magnitude of the electric fie

Nat2105 [25]

Answer:

Electric field, E = 0.064 V/m

Explanation:

It is given that,

Resistivity of silver wire, $\rho=1.59\times 10^{-8}\ \Omega-m$

Current density of the wire, $J=4\ A/mm^2=4\times 10^6\ A/m^2$

We need to find the magnitude of the electric field inside the wire. The relationship between electric field and the current density is given by :

$E=J\times \rho$

$E=4\times 10^6\times 1.59\times 10^{-8}$

E = 0.0636 V/m

E = 0.064 V/m

So, the magnitude of electric field inside the wire is 0.064 V/m. Hence, this is the required solution.

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3 years ago

Why is the physics of hssc2 so difficult?

Ivan

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3 years ago

Read 2 more answers