F2 2nd Term IS WS 01 Answers

2nd Term WS 01 Submission date：_____________ Name：______________________ Class & no.：2 _________(     )

9.1       Forces

i    Words to know:

	English term	Write the words again	Chinese term
1	Force		力
2	Motion		運動
3	Direction		方向
4	Speed		速度
5	Spring balance		彈簧秤
6	Newton		牛頓
7	Contact force		接觸力
8	Non-contact force		非接觸力

i    Skill development – Writing

1.      Amy throws the ball. Her force starts (starts/stops) the motion of the ball.

2.      Johnny catches the moving ball. His force stops the motion of the ball.

3.      A table tennis racket is hitting the table tennis ball. Its force changes the speed / direction

and the direction / speed of the motion of the ball.

4.      Johnny kicks the ball. His force starts the motion of the ball.

5.      The goalkeeper catches the ball. His force stops the motion of the ball.

6.      The tennis player is hitting the tennis ball. His force changes the speed and the direction of the motion of the tennis ball.