Work and Power Grade 8

The following activities are said to be doing work is .....

• Kevin pushed the wall

• Ernest and Jerry pushed each other equally hard in opposite directions

• Andra pulled his suitcase from the departure terminal door to the waiting room

• Richy carried his backpack

Tags

NGSS.HS-PS2-1

The product of displacement and force on an object is called .....

• Work done

• Power

• Force

• Motion

If the directions of force and displacement are perpendicular to each other, then the work produced is....

• In the same direction as the direction of displacement

• In line with the direction of force

• Perpendicular force and displacement

• 0

What is the amount of work required to move a stone with a mass of 100 kg so that it moves 2 meters?

• 100 Joule

• 1000 Joule

• 200 Joule

• 2000 Joule

Tags

NGSS.MS-PS3-5

Sinta, Galuh, Joko, and Nur are playing a game where they push a block to the left with forces of 20 N and 30 N. If the block has a mass of 5 kg and the work done on the block is 25 Joules, then the displacement experienced by the block is...

• 0,5 cm

• 5 cm

• 0,5 m

• 5 m

Tags

NGSS.HS-PS2-1

Wahyu, Agung, and Dimas are having a competition to see who can push a table with the most force. Dimas pushes the table with a work of 7200 J in 36 m. The force acting on the table is ....

• 2 N

• 20 N

• 200 N

• 2000 N

Tags

NGSS.HS-PS2-1

The following statement that shows that work done is negative is...

• Objects move in the direction of their acceleration

• Objects move in the direction of the applied force

• Objects move in opposite directions

• Objects move in the opposite direction to the applied force

Mr. Budi’s car broke down on the road even though the location is 800 m from the nearest garage. Therefore Mr. Budi pushes the car with a constant force F and does 1200 KJ of work so that finally the car can reach the garage. If the track taken by Mr. Budi is straight then the magnitude of the force F ….

• 150 N

• 1500 N

• 15000 N

• 1550 N

Tags

NGSS.HS-PS2-1

The object that has the greatest power is shown by which number?

• 4

• 3

• 2

• 1

If the object moves a rightward displacement of 5 meters, then the amount of work done on the object is ....

• 100 J

• 250 J

• 150 J

• 200 J

Tags

NGSS.HS-PS2-1