Machines Quiz 1

Question 1

A machine cannot do work by itself.

Accepted Answer

Only when an energy is supplied and this energy does some work, will the machine work.

Answer

The given statement is false.

Answer

A human is working behind the machine all the time.

Answer

None of these.

Question 2

Among the following statements, which is not the function of a machine?

Accepted Answer

None of these.

Answer

A machine can change the direction of force applied.

Answer

A machine can enhance the speed.

Answer

A machine makes the force available applied at a single point to other desired locations.

Question 3

Saneesh did an experiment with a machine in his lab. He provided some work as input and obtained some work as output. What will be the relation between the input work and output work?

Accepted Answer

Input work will be greater than output work.

Answer

Output work will be greater than input work.

Answer

Output work will be equal to input work.

Answer

No relation between input work and output work.

Question 4

Megha designed a machine of her own. She gave it some force which can be used to overcome the resistive force on her machine as $$7	ext{ }N$$. She found that the mechanical advantage of her machine is $$5$$. What will be the value of resistive force acting on the machine?

Accepted Answer

$$35	ext{ }N$$

Answer

$$\dfrac{7}{5}	ext{ }N$$

Answer

$$\dfrac{5}{7}	ext{ }N$$

Answer

$$7	ext{ }N$$

Question 5

The distance travelled by the load of a machine with efficiency $$60 \%$$ has been mentioned $$8	ext{ }m$$. The distance travelled by the effort of a machine is given as $$24	ext{ }m$$.Calculate the mechanical advantage?

Accepted Answer

$$1.8$$

Answer

$$0.2$$

Answer

$$20$$

Answer

$$180$$