What is the initial velocity of the ball in feet per second

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Reference no: EM131009220

1. Find the average velocity over the time interval [0,3] if the displacement is given by s(t)=t³-2.0t²+1.2t+5. Round your answer to two decimal places.

2. A ball is thrown vertically upward from ground level. Its height, in feet, at time t, in seconds is given by s(t)= -16t²+80.0t. What is the initial velocity of the ball in feet per second? Round your answer to two decimal places and omit the units of measurement.

3. A ball is thrown vertically upward from ground level. Its height, in feet, at time t, in seconds is given by s(t)= -16t²+60.0t+60. What is the initial velocity of the ball in feet per second? Round your answer to two decimal places and omit the units of measurement.

4. A particle moves in a straight line in such a way that the position in time is given by s(t)=t³-5.3t²+2.3t+1.Starting from time t=0, when is the first time that the particle starts moving in the negative direction? Round your answer to two decimal places.

Reference no: EM131009220

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