7.2 tenaga keupayaan dan tenaga kinetik (sains tingkatan 3)
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Science
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3rd Grade
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Apakah daya yang bertindak ke atas sebuah kotak apabila diangkat?
what is the force that reacts on a box when it was lifted?
daya magnet / magnetic force
daya geseran / frictional force
daya tarikan graviti / gravitational force
tiada daya terlibat / no force involved
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
apakah tenaga bagi spring yang dimampatkan?
what is the energy of a compressed spring?
tenaga kinetik / kinetic energy
tenaga keupayaan kenyal / elastic potential energy
tenaga mekanikal / mechanical energy
tenaga keupayaan graviti / gravitational potential energy
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
mengapakah sebuah lori yang sedang bergerak mempunyai tenaga kinetik yang tinggi?
why does a moving lorry have high kinetic energy?
lori boleh mengatasi banyak rintangan udara / the lorry can overcome more air resistance
jisim lori itu besar / the mass of a lorry is big
lori itu lebih berkuasa / the lory is powerful
lori mempunyai tayar yang besar / the lorry has big tyres
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
hitung tenaga kinetik helang itu dengan jisim 4kg apabila terbang pada kelajuan 10ms-1
calculate the kinetic energy of the eagle with mass of 4kg if it flies at a speed of 10m/s
20
40
200
400
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
rajah menunjukkan seorang buruh menarik satu baldi berisi bata seberat 20kg dari atas tanah ke satu ketinggian 15m, hitung tenaga graviti =mgh
diagam show a labourer pulled a bucket of bricks with weight of 20kg from the ground to a height of 15m, calculate gravitational force=mgh
3 J
30 J
300 J
3000 J
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
hitung tenaga kinetik Ali jika dia menolak kereta sorong itu pada kelajuan 2ms-1. jisim kereta sorong adalah 50kg
calculate the kinetic energy by ali if he push the wheelbarrow at a speed of 2m/s. the mass of the wheelbarrow is 50kg.
1/2 MV2
1 J
10 J
100 J
1000 J
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4 biji kelapa dengan sama jisim dilepaskan pada ketinggian yang berbeza ke permukaan tanah dengan ketinggian A = 10m, B= 20m, C=30m dan D=5m, yang manakah akan menghasilkan lekukkan paling dalam pada permukaan tanah
A
B
C
D
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