The centers of gravity of three trucks parked on a hill are shown by the dots.Which truck(s) will tip over?

1. A 2. B 3. C

1. A 2. B 3. C

The centers of gravity of three trucks parked on a hill are shown by the dots.Which truck(s) will tip over?

When she shakes the basketful of berries, the larger berries will

1. sink to the bottom.2. go to the top.3. not particularly sink or rise, but like the

smaller berries, be randomly distributed.

1. sink to the bottom.2. go to the top.3. not particularly sink or rise, but like the

smaller berries, be randomly distributed.

When she shakes the basketful of berries, the larger berries will

Which will roll down a hill faster, a can of regular fruit juice or a can of frozen fruit juice?1. Regular fruit juice2. Frozen fruit juice3. Depends on the relative sizes and weights

of the cans

1. Regular fruit juice2. Frozen fruit juice3. Depends on the relative sizes and weights

of the cans

Which will roll down a hill faster, a can of regular fruit juice or a can of frozen fruit juice?

Roll a pair of identical cans of carbonated beverage down an incline. You won’t be surprised to find they roll at the same rate. Now shake one of them so bubbles form inside, then repeat the experiment. You’ll be delighted to observe that

1. the shaken can wins the race.2. the shaken can loses the race.3. both cans still roll together.

1. the shaken can wins the race.2. the shaken can loses the race.3. both cans still roll together.

Roll a pair of identical cans of carbonated beverage down an incline. You won’t be surprised to find they roll at the same rate. Now shake one of them so bubbles form inside, then repeat the experiment. You’ll be delighted to observe that

A pair of upright metersticks, with their lower ends against a wall, are allowed to fall to the floor. One is bare, and the other has a heavy weight attached to its upper end. The stick to hit the floor first is the

1. weighted stick.2. bare stick.3. … both the same.

1. weighted stick.2. bare stick.3. … both the same.

A pair of upright metersticks, with their lower ends against a wall, are allowed to fall to the floor. One is bare, and the other has a heavy weight attached to its upper end. The stick to hit the floor first is the

The broom balances at its center of gravity. If you saw the broom into two parts through the center of gravity and then weigh each part on a scale, which part will weigh more?

1. Short broom part2. Long broom part

1. Short broom part2. Long broom part

The broom balances at its center of gravity. If you saw the broom into two parts through the center of gravity and then weigh each part on a scale, which part will weigh more?

When a tether ball wraps around a pole, the speed of the ball

1. increases.2. decreases.3. remains unchanged.

1. increases.2. decreases.3. remains unchanged.

When a tether ball wraps around a pole, the speed of the ball

Inverse Lawn Sprinkler

With a nail poke four holes in an aluminum pop can as shown. In each hole bend the nail sideways and dent the holes so that when water is put in the can it will spurt out with a tangential component. Suspend the can with strings and watch it rotate as water spurts from it—noting its direction of rotation. Now empty the can; weigh it down at its bottom so that when you suspend it in water it remains upright as water flows into the holes.Question: What's the direction of rotation?

1. Same as before.2. Opposite.3. Not at all.

1. Same as before.2. Opposite.3. Not at all.

Inverse Lawn Sprinkler

With a nail poke four holes in an aluminum pop can as shown. In each hole bend the nail sideways and dent the holes so that when water is put in the can it will spurt out with a tangential component. Suspend the can with strings and watch it rotate as water spurts from it—noting its direction of rotation. Now empty the can; weigh it down at its bottom so that when you suspend it in water it remains upright as water flows into the holes.Question: What's the direction of rotation?