Question

Good morning
50 points
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A force F stops a body mass ‘m’ moving with a velocity v in a distance ‘s’. The force required to stop a body of double the mass moving with double the velocity in the same distance is


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plz explain​

Answer 1

Explanation:

We know Force F=mass×acceleration

From equation of motion we have,

v2=u2+2as

a=2su2 

Thus for first condition when force F is applied to stop a mass of m kg 

F1=m2su2

Now when mass is double along with its velocity force F2 required to stop the body will be

F2=2m2s4u2

F2=82smu2  

F2=8F1  

Answer 2

Answer:

Thermosetting plastics are used to make saucepan handles because they are bad conductors of heat and also on heating, these plastics do not get softened.

b) Bakelite is a kind of thermosetting plastic which is a bad conductor of heat and electricity. Because of this property it is used for making electric plugs, switches, plug boards, etc.