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24 terms

25) The acceleration of gravity on the Moon is only one-sixth of that on Earth. If you hit a baseball

on the Moon with the same effort (and at the speed and angle) that you would on Earth, the

ball would lan

on the Moon with the same effort (and at the speed and angle) that you would on Earth, the

ball would lan

C) 6 times as far

24) A pilot drops a bomb from a plane flying horizontally at a constant speed. Neglecting air

resistance, when the bomb hits the ground the horizontal location of the plane wil

resistance, when the bomb hits the ground the horizontal location of the plane wil

B) be over the bomb

23) A package of supplies is dropped from a plane, and one second later a second package is

dropped. Neglecting air resistance, the distance between the falling packages wil

dropped. Neglecting air resistance, the distance between the falling packages wil

C) increase

22) A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a

package. Two seconds later it drops a second package. How far apart will the two packages

land on the ground

package. Two seconds later it drops a second package. How far apart will the two packages

land on the ground

A) 100

21) A bullet is fired horizontally, and at the same instant a second bullet is dropped from the same

height. Ignore air resistance. Compare the

times of fall of the two bullets

height. Ignore air resistance. Compare the

times of fall of the two bullets

C) They hit at the same time

20) A stone is thrown horizontally from the top of a tower at the same instant a ball is dropped

vertically. Which object is traveling faster when it hits the level ground below

vertically. Which object is traveling faster when it hits the level ground below

B) the stone

19) When a football in a field goal attempt reaches its maximum height, how does its speed

compare to its initial speed

compare to its initial speed

B) It is less than its initial speed

18) A ball is thrown at an original speed of 8.0 m/s at an angle of 35e above the horizontal. What is the speed of the ball when it returns to the same horizontal level

B) 8.0 m/s

19)You are throwing a ball for the second time. If the ball leaves your hand with twice the

velocity it had on your first throw, its horizontal range R (compared to your first serve) would

be

velocity it had on your first throw, its horizontal range R (compared to your first serve) would

be

D) four times as much

16) An Olympic athlete throws a javelin at four different angles above the horizontal, each with

the same speed: 30e, 40e, 60e, and 80e. Which two throws cause the javelin to land the same distance away

the same speed: 30e, 40e, 60e, and 80e. Which two throws cause the javelin to land the same distance away

D) 30e and 6e

15) At what angle should a water-gun be aimed in order for the water to land with the greatest

horizontal range

horizontal range

C) 45

14) If the acceleration of an object is always directed perpendicular to its velocity

C) the object is turning

13) If the acceleration vector of an object is directed anti-parallel to the velocity vector

C) the object is slowing down

12) A soccer ball is kicked with a velocity of 25 m/s at an angle of 45e above the horizontal. What

is the vertical component of its acceleration as it travels along its trajectory

is the vertical component of its acceleration as it travels along its trajectory

A) 9.80 m/s2 downward

11) Ignoring air resistance, the horizontal component of a projectile's acceleration

A) is zero

10) A ball is thrown with a velocity of 20 m/s at an angle of 60e above the horizontal. What is the

horizontal component of its instantaneous velocity at the exact top of its trajectory

horizontal component of its instantaneous velocity at the exact top of its trajectory

A) 10 m/s

9) Ignoring air resistance, the horizontal component of a projectile's velocity

B) remains constant

7) Three forces, each having a magnitude of 30 N, pull on an object in directions that are 120e

apart from each other. Make a statement concerning the resultant force

apart from each other. Make a statement concerning the resultant force

A) The resultant force is zero

6) Two vectors, of magnitudes 20 and 50, are added. Which one of the following is a possible

answer for the magnitude of the resultant

answer for the magnitude of the resultant

C) 40

5) Two displacement vectors have magnitudes of 5.0 m and 7.0 m, respectively. When these two

vectors are added, the magnitude of the sum

vectors are added, the magnitude of the sum

B) could be as small as 2.0 m, or as large as 12 m

4) The resultant of two vectors is the smallest when the angle between them is

D) 180

3) Which of the following is an accurate statement

A) A vector cannot have zero magnitude if one of its components is not zero

2) Which of the following operations will not change a vector

A) Translate it parallel to itself

1) Which one of the following is an example of a vector quantity?

B) velocity