For a flourish at the end of her act, a juggler tosses a single ball high in the air. She catches the ball $3.2$ s later at the same height from which it was thrown. What was the initial upward speed of the ball?

When a chameleon captures an insect, its tongue can extend 16 cm in 0.10 s. Find the magnitude of the tongue's acceleration, assuming it to be constant.

Seagulls are often observed dropping clams and other shellfish from a height onto rocks below, as a means of opening the shells. If a seagull drops a shell from rest from a height of 14 m, how fast is the shell moving when it hits the rocks?

Assume that the brakes in your car create a constant deceleration. If you double your driving speed, how does this affect (a) the time required to come to a stop and (b) the distance needed to stop? Explain.

The infamous chicken is dashing toward home plate with a speed of $5.7 \mathrm{~m} / \mathrm{s}$ when he decides to hit the dirt. The chicken slides for $1.2 \mathrm{~s}$, just reaching the plate as he stops (safe, of course). What are the magnitude and direction of the chicken's acceleration?

Assume that the brakes in your car create a constant deceleration, regardless of how fast you are going. If you double your driving speed, how does this affect the distance needed to stop?

When you receive a chest $x$-ray at a hospital, the $x$-rays pass through a series of parallel ribs in your chest. Do the ribs act as a diffraction grating for $\mathrm{x}$-rays?

The infamous chicken is dashing toward home plate with a speed of $5.7 \mathrm{~m} / \mathrm{s}$ when he decides to hit the dirt. The chicken slides for $1.2 \mathrm{~s}$, just reaching the plate as he stops (safe, of course). How far did the chicken slide?

A cliff diver drops from rest to the water below. How many seconds does it take for the diver to go from 0 to 60 ; that is, to go from $0 \mathrm{mph}$ to $60 \mathrm{mph}$ ? (For comparison, it takes about $3.5 \mathrm{~s}$ to $4.0 \mathrm{~s}$ for a powerful car to go from 0 to 60 .)

Rocket blasts off and moves straight upward from the launch pad with constant acceleration. After $3.0 \mathrm{~s}$ the rocket is at a height of $77 \mathrm{~m}$. What is its speed at this time?

A boat is cruising in a straight line at a constant speed of $2.6 \mathrm{~m}$ when it is shifted into neutral. After coasting $12 \mathrm{~m}$ the engine engaged again, and the boat resumes cruising at the reduced col stant speed of $1.6 \mathrm{~m} / \mathrm{s}$. Assuming constant acceleration whi coasting, What was the speed of the boat when it had coasted for $6.0 \mathrm{~nr}$ Explain.

A Tongue's Acceleration When a chameleon captures an insect, its tongue can extend $16 \mathrm{~cm}$ in $0.10 \mathrm{~s}$. Find the extension of the tongue in the first $0.050 \mathrm{~s}$.

A rocket blasts off and moves straight upward from the launch pad with constant acceleration. After $2.85$ the rocket is at a height of $91 \mathrm{~m}$. What is its speed at this time?

A boat is cruising in a straight line at a constant speed of $2.6 \mathrm{~m} / \mathrm{s}$ when it is shifted into neutral. After coasting $12 \mathrm{~m}$ the engine is engaged again, and the boat resumes cruising at the reduced constant speed of $1.6 \mathrm{~m} / \mathrm{s}$. Assuming constant acceleration while coasting. What was the boat's acceleration while it was coasting?