Correct

砰

/ pēng / 
Strokes

Definition

(onom.) bang/thump

Example

As an Onomatope

smash; crash; thud; bang

1
Qìchē
汽车
pēng
砰
dì
地
zhuàng
撞
dào
到
shùshàng
树上
  
。

The car bumped into the tree with a loud bang. / The car hit the tree with a bang.

2
Wū
屋
ménpēng
门砰
de
的
yī
一
shēng
声
guānshàng
关上
le
了
  
。

The door shut with a bang. / The door banged shut.

3
Pēngrán
砰然
dǎo
倒
zài
在
dìbǎn
地板
shàng
上

fall on the floor with a thud

4
Pēngpēng
砰砰
qiāomén
敲门

thump at the door; bang on the door