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JennV

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## Homework Statement

A car that is initially at rest at the origin has an acceleration of 7.20 m/s2 along the positive x-axis (the ground). At the instant the car is at the origin, you mischeivously throw a ball H=34.9m directly above the car at 43.8 degrees below the horizontal at an unknown speed Vo in such a way as to eventually hit the car.

A: Neglecting air resistance, what initial speed is required for the ball to strike the car moving along the x-axis?

B: How long does it take for the ball to strike the car?

C: How fast is the ball moving at the instant it strikes the car?

## Homework Equations

x(t)=Xo+Vo*cos(theta)t

Vx(t)=Vo*cos(theta)

y(t)=Vo*sin(theta)t-(1/2)gt^2

Vy(t)=Vo*sin(theta)-gt

## The Attempt at a Solution

I tried plugging in values in these formulas, but I just got totally lost. All I'm hoping for is a starting point.

Thank you very much.

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