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平抛运动 horizontal projectile motion

Total questions: 5

Worksheet time: 25mins

Name
Class
Date
1.

维尼用 2.6 N 的力推动 0.75 kg 的小球。
Winnie pushes a stationary ball of mass 0.75 kg with a force of 2.6 N.
小球加速度acceleration of the ball = (a)    m s2m\ s^{-2}  

2.

(续)已知  a=3.47 m s2a=3.47\ m\ s^{-2}  
小球从静止开始,在光滑桌面上滑动了 53 cm 后掉下.
The ball starts from rest, rolls on a smooth table for 53 cm and falls down. 
小球离开桌子的水平初速 
the horizontal initial velocity of the ball leaving the table
= (a)     m s1m\ s^{-1}  

3.

(续) 已知  ux=1.92 m s1u_x=1.92\ m\ s^{-1}  
小球掉落后,在离桌子96 cm的地方落地。
After falling, the ball reaches the ground at a distance of 96 cm away from the table. 

小球离开桌面后掉地所需的时间
the time taken by the ball falls
= (a)   s

4.

(续)已知  t=0.5 st=0.5\ s  
桌子的高度 The height of the table
= (a)   m

5.

(续) 已知  ux=1.92 m s1, t=0.5 su_x=1.92\ m\ s^{-1},\ t=0.5\ s  
小球掉到地面前的速率
the speed of the ball right before it touches the ground
= (a)     m s1 m\ s^{-1\ }