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2 years ago

The kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s is J.

Physics

2 answers:

Svetlanka [38]2 years ago

8 0

2.5 joules according to the formula k=1/2MVsquare we would get 2.5 joules as the answer

DENIUS [597]2 years ago

5 0

25 joules would be the correct answer

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A vector has a magnitude of 46.0 m and points in a direction 20.0° below the positive x-axis. A second vector, , has a magnitude

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Answer with Step-by -step explanation:

We are given that

b. $\mid A\mid=46 m$

$\theta=20^{\circ}$ below the positive x-axis

Therefore, the angle made by vector A in counter clockwise direction when measure from positive x-axis= $x=360-20=340^{\circ}$

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y-Component of vector A= $A_y=\mid A\mid sinx=46sin340=46(-0.34)=-15.64$

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Vector A= $A_xi+A_yj=43.24i-15.64j$

Vector B= $B_xi+B_yj=63.64i+57.62j$

Vector C=A+B

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2 years ago

Car B has the same mass as Car A but is going twice as fast. If the same constant force brings both cars to a stop, how far will

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Given

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but velocity of car B is same as of car A

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using to find the distance traveled

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u=initial velocity

a=acceleration(offered by force)

s=displacement

final velocity is zero

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$s_a=\frac{u^2}{2a}------1$

For car B

$0-(2u)^2=2\times a\times s_b$

$s_b=\frac{4u^2}{2a}----2$

divide 1 and 2 we get

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