Biology; Chemistry; Physics: Post your doubts here!

[usama321]

but isnt gravity acting on it????

the resultant force is the sum of all the forces. Now the weight 200N of the load is cancelled out by the tension in the wire, and the object is at rest, or as we say, in equilibrium. Thus the answer should be A

 

[asma tareen]

the resultant force is the sum of all the forces. Now the weight 200N of the load is cancelled out by the tension in the wire, and the object is at rest, or as we say, in equilibrium. Thus the answer should be A

hmm got it thnx

 

[Usama Jawad]

but isnt gravity acting on it????

but the object is not MOVING in the direction of gravity.it is at rest ie stationary

 

[asma tareen]

hmm but still its moving in the opposite direction

 

[asma tareen]

hmm but still its moving in the opposite direction

 

[Usama Jawad]

hmm but still its moving in the opposite direction

It is not moving,it is in equilibrium like usama321 said

 

[asma tareen]

hmmm ok
thnx

 

[Usama Jawad]

no problem

 

[usama321]

It is not moving,it is in equilibrium like usama321 said

lol it sounds so awkard usama321. i don't know what i was thinking when i decided that name

 

[Usama Jawad]

lol it sounds so awkard usama321. i don't know what i was thinking when i decided that name

lol usama321......Blast Off!!!!just kidding

 

[usama321]

 

[asma tareen]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_s12_qp_12.pdf
can anyone tell me ans ov Q6 and 7???

 

[Saad Mughal]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_s12_qp_12.pdf
can anyone tell me ans ov Q6 and 7???

Both have the answer A.
In 6, the motorcyclist is moving in circular motion hence a centripetal force acts on the motor cycle, since the motor cycle is leaning towards the left, the centripetal force of circular motion is A.

In 7, the force at P produces a clockwise moment, so, applying the principal of moments,
2*P + 2*4 = 3*6
Hence,
P = 5 N.

 

[asma tareen]

Both have the answer A.
In 6, the motorcyclist is moving in circular motion hence a centripetal force acts on the motor cycle, since the motor cycle is leaning towards the left, the centripetal force of circular motion is A.

In 7, the force at P produces a clockwise moment, so, applying the principal of moments,
2*P + 2*4 = 3*6
Hence,
P = 5 N.

whats a centripetal force???

 

[Saad Mughal]

whats a centripetal force???

A centripetal force is a force that acts towards the center of a circular path, it is responsible for making bodies travel in circular motion.

 

[asma tareen]

A centripetal force is a force that acts towards the center of a circular path, it is responsible for making bodies travel in circular motion.

hmm kay got it thnx

 

[Saad Mughal]

hmm kay got it thnx

 

[usama321]

Some water in a beaker is heated. For the first 100s, the increase in temperature is 50 C. For the next 100s, the increase in temperature is 25 C. Why is there a difference in the increase in temperature? Anyone help please?

 

[nidz]

Some water in a beaker is heated. For the first 100s, the increase in temperature is 50 C. For the next 100s, the increase in temperature is 25 C. Why is there a difference in the increase in temperature? Anyone help please?

Can you tell the whole question? Maybe it's because more heat is lost to the surroundings as temperature of water increases?

 

[usama321]

Can you tell the whole question? Maybe it's because more heat is lost to the surroundings as temperature of water increases?

that is what i was thinking, but the experiment conditions were the same. I don't know the question number