10 Questions
| Attempts: 176

Questions and Answers

- 1.
- A bullet is fired at an angle of 45
^{O}. Neglecting air resistance, what is the direction of acceleration during the flight of the bullet?

- A.
Upward

- B.
Dependent on the initial velocity

- C.
Downward

- D.
At a 45 O angle

- A bullet is fired at an angle of 45
- 2.A golfer drives her golf ball from the tee down the fairway in a high arching shot. When the ball is at the highest point of its flight:
- A.
The velocity and acceleration are both zero

- B.
The x-velocity is zero and the y-velocity is zero

- C.
The x-velocity is non-zero and the y-velocity is zero

- D.
The velocity is non-zero and the acceleration is zero

- 3.For a projectile, what is the acceleration in the x-direction?
- A.
Depends on initial velocity

- B.
Depends on how long it is in the air

- C.
0 m/s2

- D.
Depends on y-acceleration

- 4.An object is launched at an angle. How does the final velocity compare to the initial velocity if it lands at the same horizontal level?
- A.
Opposite

- B.
Unable to determine

- C.
Equal and opposite

- D.
Equal

- 5.A volleyball player taps a volleyball well above the net. The ball’s speed is least
- A.
Just after it is tapped by the player.

- B.
At the highest point of its path.

- C.
Just before it strikes the ground.

- D.
When the horizontal and vertical components of its velocity are equal.

- 6.Which of the following is NOT true of a projectile launched from the ground at an angle?
- A.
The horizontal velocity is constant

- B.
The vertical acceleration is upward during the first half of the flight, and downward during the second half of the flight.

- C.
The horizontal acceleration is zero.

- D.
The vertical acceleration is 9.81 m/s2 down.

- E.
The time of flight can be found by horizontal distance divided by horizontal velocity.

- 7.As the launch angle of a projectile is increased from an angle of 0° to an angle of 90°, the range of a projectile will:
- A.
Increase then decrease

- B.
Decrease then increase

- C.
Remain unchanged

- D.
Increase only

- 8.The narrowest straight on Earth is Seil Sound in Scotland, which lies between the mainland and the island of Seil. The straight is only about 6.0 m wide. Suppose an athlete waning to jump “over the sea” leaps at an angle of 35
^{o}with respect to the horizontal. How much time does the athlete spend in the air?- A.
1.32 s

- B.
0.84 s

- C.
0.93 s

- D.
1.77 s

- 9.The narrowest straight on Earth is Seil Sound in Scotland, which lies between the mainland and the island of Seil. The straight is only about 6.0 m wide. Suppose an athlete waning to jump “over the sea” leaps at an angle of 35
^{o}with respect to the horizontal. What is the maximum height reached by the athlete?- A.
1.05 m

- B.
0.18 m

- C.
0.02 m

- D.
0.35 m

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