2 years ago

A stone has a volume of 0.50 cm³ and a mass of

1 answer:

8 0

Answer:

ρ = M / V = 2 g / .5 cm^3 = 4 g/cm^3

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damaskus [11]

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3 years ago

Tresset [83]

Answer: 2.92 s

Explanation:

Given

Mass of ball is $m=3.9\ kg$

The initial velocity of the ball is $u=-3.5\ m/s$

Velocity after the rebound is $v=15.9\ m/s$

Force during the contact is $F=25.9\ N$

We know, change in momentum is Impulse

$\Rightarrow F\cdot \Delta t=m(\Delta v)$

$\Rightarrow 25.9\cdot \Delta t=3.9(15.9-(-3.5))\\\\\Rightarrow \Delta t=\dfrac{3.9\times 19.4}{25.9}=2.92\ s$

Thus, the force is applied for 2.92 s

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PIT_PIT [208]

The object will continue moving in a straight line at constant speed.

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horrorfan [7]

I think I has to be C

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Serhud [2]

P = m*v 7.5 = m*15 m = 7.5/15 = 0.5 kg

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