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Chapter 3: Q16. (page 67)
At what point in its path does a projectile have the least speed?
A projectile has the least speed at the top of its path.
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You are riding in an enclosed train car moving at 90 km/h. Where will the baseball land if you throw it straight upward?
(a) In front of you
(b) Behind you
(c) On your hand
(d) Can鈥檛 be decided from the given information
In archery, should the arrow be aimed directly at the target? How should your angle of aim depend on the distance to the target?
Which of the following statements are not valid for a projectile? Take the upward direction as positive.
(a) The projectile has the same x velocity at any point on its path.
(b) The acceleration of the projectile is positive and decreasing when the projectile is moving upward, zero at the top, and increasingly negative as the projectile descends.
(c) The acceleration of the projectile is a constant negative value.
(d) The y component of the velocity of the projectile is zero at the highest point of the projectile鈥檚 path.
(e) The velocity at the highest point is zero.
Vectoris 6.6 units long and points along the negative X-axis. Vectoris 8.5 units long and points atto the positive X-axis. (a) what are the X and Y components of each vector? (b) Determine the sum(magnitude and angle).
A person going for a morning jog on the deck of a cruise ship is running toward the bow (front) of the ship at 2.0 m/s while the ship is moving ahead at 8.5 m/s. What is the velocity of the jogger relative to the water? Later, the jogger is moving toward the stern (rear) of the ship. What is the jogger鈥檚 velocity relative to the water now?
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