Question

A fill in the blanks.

1 Work is said to be done when a............. moves a body in it's own direction.

2. If a force causes zero displacement, then work done is..................

3. Complex machines are made of a................... of two or more machine.

4. A screw jack acts as a................
multiplier.

5. in a class Ill lever, the.................
is between the load and the.................

6. A.................... is commonly used for holding things together and lifting materials.

7. The sharper the wedge, the................. it is to pierce the object.
​

Answer 1

Answer:

1. Force

3. Device

4.Force

Answer 2

Answer:

1.force,2.zero,3.energy,4mass, speed 5.9.8j,6.chemical to mechanical