Recent content by xcortz

Homework Statement A 2 kg ball (k factor of 0.02 m-1) is in free fall. The initial downward velocity of the ball is 12 m/s. Find the difference in displacement after 1s both with and without air resistance. Homework Equations vf = vi + at y = yi + 1/2(vi+vf)t y - yi = vit + (1/2)At2 - (1/3)Bt3...

Because when I plugged the numbers in and solved for an exact value, I got 12.32/5 and it was wrong apparently

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They want an exact value, not a decimal answer. I don't know what the exact value is for sin2/5 or tan3/4

cos(a+b)=cosacosb-sinasinb

Homework Statement Angle a is located in the second quadrant where sin a=2/5 and angle b is located in the third quadrant where tan b=3/4. Determine an exact value for cos(a+b) and where it is located. Homework Equations cos(a+b)=cosacosb+sinasinb The Attempt at a Solution I don't know what...

would that be 1.178m/s? because 2pi(9m)/48s

it takes 0.8mins to make one revolution

Homework Statement The angular velocity of the ferris wheel with a diameter of 18m is pi/24 radians/s. How would that compare to m/s? Homework Equations v=(2pi(r))/360 The Attempt at a Solution 2pi(9)/360 =0.157m/s

Homework Statement A stunt driver for a movie needs to make a 2545kg car skid on a large, flat, parking lot surface. The force of friction between the tires and the concrete surface is 1.75x10^4N and he is driving at a speed of 24m/s. As he turns more sharply, what radius of curvature will he...