Free Printable phy_2.8_projectile motion 拋體運動 1

1.

祝祝把小球從大廈的頂部沿水平方向擲出，小球的初速率是20 m s-1。5秒後小球的水平速率 $v_x$ 是多少？
A ball is projected horizontally from the top of a building at 20 m s-1. What is its horizontal speed $v_x$ 5 s later?

a)

20 m s^–1

b)

49 m s^–1

c)

53 m s^–1

d)

69 m s^–1

2.

小區把小球從大廈的頂部沿水平方向擲出，小球的初速率是20 m s-1。5秒後小球的垂直速率 $v_y$ 是多少？
A ball is projected horizontally from the top of a building at 20 m s-1. What is its vertical speed $v_y$ 5 s later?

a)

20 m s^–1

b)

49 m s^–1

c)

53 m s^–1

d)

69 m s^–1

3.

羅文把小球從大廈的頂部沿水平方向擲出，小球的初速率是20 m s–1。5秒後小球的速率v是多少？ $v=\sqrt{v_x^2+v_y^2}$
A ball is projected horizontally from the top of a building at 20 m s-1. What is its speed v 5 s later? $v=\sqrt{v_x^2+v_y^2}$

a)

20 m s–1

b)

49 m s^–1

c)

53 m s^–1

d)

69 m s^–1

4.

一架轟炸機以恆定速度向右水平飛行，每隔一秒投擲一枚炸彈，共投下三枚。三枚炸彈在投擲時相對於轟炸機是靜止的。以下哪幅圖正確顯示投彈後炸彈和轟炸機的位置？

Three bombs are released from a bomber flying horizontally with a constant velocity to the right. They are released from rest relative to the bomber one by one at one-second intervals. Which of the following diagrams correctly shows the positions of the bombs and the bomber after the bombs are released?

a)

b)

c)

d)

5.

球A和B處於同一高度，B的質量是A的兩倍。在同一時間，A由靜止自由下落，B則以速率u水平地射出。以下哪些敘述是正確的？

(1) A和B在同一時間著地。

(2) A和B的加速度相同。

(3) A和B著地時的垂直速率相同。

a)

只有 (1) 和 (2)

b)

只有 (1) 和 (3)

c)

只有 (2) 和 (3)

d)

(1)、(2) 和 (3)

6.

子彈沿水平方向射向前方1.0 m處的垂直牆壁，射中牆壁的位置在發射點下方0.5 m。子彈的飛行時間是多少？ $\left(s_y=\frac{1}{2}gt^2\right)$
A bullet is fired horizontally towards a vertical wall 1.0 m away. It hits the wall at a point 0.5 m below the point of projection. What is the time of flight of the bullet? $\left(s_y=\frac{1}{2}gt^2\right)$

a)

0.202 s

b)

0.226 s

c)

0.253 s

d)

0.319 s

7.

子彈沿水平方向射向前方1.0 m處的垂直牆壁，射中牆壁的位置在發射點下方0.5 m。子彈以何速率u射出？ $\left(s_x=ut\right)$
A bullet is fired horizontally towards a vertical wall 1.0 m away. It hits the wall at a point 0.5 m below the point of projection. At what speed u is the bullet fired? $\left(s_x=ut\right)$

a)

3.13 m s^–1

b)

3.95 m s^–1

c)

4.43 m s^–1

d)

4.95 m s^–1

8.

子彈沿水平方向射向前方1.0 m處的垂直牆壁，射中牆壁的位置在發射點下方0.5 m。子彈射中牆壁時的速率v是多少？ $\left(v=\sqrt{v_y^2+v_x^2}\right)$
A bullet is fired horizontally towards a vertical wall 1.0 m away. It hits the wall at a point 0.5 m below the point of projection. At what speed v does the bullet hit the wall? $\left(v=\sqrt{v_y^2+v_x^2}\right)$

a)

3.13 m s^–1

b)

3.95 m s^–1

c)

4.43 m s^–1

d)

4.95 m s^–1

9.

肥熙把球從桌面沿水平方向拋出，球的初速率為u，在著地前一刻的速率是v。在著地前，球的垂直速率 $v_y$ 是多少？ $\left(v_x^2+v_y^2=v^2\right)$
A ball is projected horizontally from a table with an initial speed u. It attains a speed v just before hitting the ground. What is its vertical speed $v_y$ just before hitting the ground? $\left(v_x^2+v_y^2=v^2\right)$

a)

$\frac{u+v}{2}$

b)

$\sqrt{uv}$

c)

$\sqrt{u^2+v^2}$

d)

$\sqrt{v^2-u^2}$

10.

吉銘把球從桌面沿水平方向拋出，球的初速率為u，在著地前一刻的速率是v。球的飛行時間是多少？ $\left(v_y=gt\right)$
A ball is projected horizontally from a table with an initial speed u. It attains a speed v just before hitting the ground. hat is the time of flight of the ball? $\left(v_y=gt\right)$

a)

$\frac{v}{g}$

b)

$\frac{\left(v-u\right)}{g}$

c)

$\frac{\sqrt{v^2-u^2}}{g}$

d)

$\frac{\sqrt{v^2-u^2}}{2g}$

11.

淑晶把球從桌面沿水平方向拋出，球的初速率為u，在著地前一刻的速率是v。球的水平位移 $s_x$ 量值是多少？ $\left(s_x=ut\right)$
A ball is projected horizontally from a table with an initial speed u. It attains a speed v just before hitting the ground. What is the magnitude of the horizontal displacement $s_x$ of the ball? $\left(s_x=ut\right)$

a)

$\frac{uv}{g}$

b)

$\frac{u\left(v-u\right)}{g}$

c)

$\frac{u\sqrt{v^2-u^2}}{g}$

d)

$\frac{u\sqrt{v^2-u^2}}{2g}$

12.

圖中的頻閃照顯示一粒子在一豎直面上從位置P水平地投射至空氣。粒子其後到達位置Q和R，而P和Q相隔的時段跟Q和R的相等。求Q的位置。

The stroboscopic picture shows a particle projected horizontally at position P into the air in a vertical plane. Subsequently the particle reaches positions Q and R such that the time interval between P and O is equal to that between Q and R. Where is Q?

a)

b)

c)

d)

13.

一粒子在一豎直面上從位置P水平地投射至空氣，並以0.05 s的時距進行頻閃照相。求粒子到達位置R所需的時間。

A particle projected horizontally at position P into the air in a vertical plane. A stroboscopic photo is taken at 0.05 s time intervals. What is the time needed to arrive R?

a)

0.05 s

b)

0.10 s

c)

0.15 s

d)

0.20 s

14.

一粒子在一豎直面上從位置P水平地投射至空氣，並以0.05 s的時距進行頻閃照相。求粒子在R的垂直速率 $v_y$ 。 $\left(v_y=gt\right)$
A particle projected horizontally at position P into the air in a vertical plane. A stroboscopic photo is taken at 0.05 s time intervals. Find its vertical speed $v_y$ at R. $\left(v_y=gt\right)$

a)

0.49 m s^-1

b)

0.98 m s^-1

c)

1.47 m s^-1

d)

1.96 m s^-1

15.

一粒子在一豎直面上以1 m s-1的初速從位置P水平地投射至空氣，並以0.05 s的時距進行頻閃照相。求粒子在R的速率 v。 $\left(v=\sqrt{v_x^2+v_y^2}\right)$
A particle is projected horizontally with an initial speed of 1 m s-1 at position P into the air in a vertical plane. A stroboscopic photo is taken at 0.05 s time intervals. Find its speed v at R. $\left(v=\sqrt{v_x^2+v_y^2}\right)$

a)

1.11 m s^-1

b)

1.40 m s^-1

c)

1.78 m s^-1

d)

2.2 m s^-1

phy_2.8_projectile motion 拋體運動 1

Total questions: 15

Worksheet time: 4hrs 45mins

Similar Resources on Wayground