Question

A water tank filled upto 2/3 of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would:
1. move backward due to Newtons third law of motion
2. move forward due to Newton's third law of motion
3. comes to the rest due to frictional force
4. remains unaffected
5. move forward due to Newton's first law of motion
6. move forward due to inertia of motion

What’s the correct option/options?
(You can choose more than one option)

Answer 1

Answer:

Since x and angle 125° makes a linear pair.

Therefore,

x+125°=180°

⇒x=180°−125°=55°

Also, angle 125° is the exterior angle of given triangle.

As we know that exterior angle of a triangle is equal to the sum of the opposite interior angles.

∴60°+y=125°

⇒y=25°−60°=65°

Hence value of x and y are 55° and 65° respectively.

Answer 2

Answer:

5.) and 6.)

Explanation:

When the water tank stops suddenly, the water will move forward as an external force (the brake) has been applied (Newton's 1st law). so. 5.) is correct.

The water will also move forward due to its inertia. So, 6.) is correct.