Dse physics
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DSE Physics. Mechancis. constant speed. 12 N. 2 N .

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DSE Physics

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Dse physics

DSE Physics


Mechancis

Mechancis


Dse physics

constant speed

12 N

2 N

A block on a rough horizontal surface is moving to the left with constant speed under two horizontal forces 2 N and 12 N indicated as shown. If the force of 12 N is suddenly removed, what is the net force acting on the block at that instant ?


Dse physics

v /m s−1

4

3

Q

2

1

t /s

P

0

1 2 3 4 5

−1

−2

Two particles P and Q start from the same position and travel along the same straight line. The figure shows the velocity-time (v-t) graph for P and Q. Which of the following descriptions about their motion is/are correct ?

(1)At t = 1 s, P changes its direction of motion.

(2)At t = 2 s, the separation between P and Q is 4 m.

(3)At t = 4 s, P and Q meet each other.


Dse physics

G

154 N

Y

ground

X

0.5 m

0.7 m

What is the reaction acting on the wheel X from the ground ?


Dse physics

Wave


Electricity and magnetism

Electricity and Magnetism


Dse physics

mag. force on A

I

I

I

I

A

B


Radioactivity and nuclear energy

Radioactivity and Nuclear Energy


Energy and use of energy

Energy and Use of Energy


Dse physics

Energy and Use of Energy


Medical physics

Medical Physics


Dse physics

Medical Physics


Assessment

Assessment


Dse physics

Assessment


To become a good student in physics you have to be

  • very careful in doing calculations

  • eager to investigate deep into questions and difficult concepts

  • able to associate day-to-day phenomena with physics

  • prepared to work very hard to solve a lot of problems

  • willing to accept challenges and won’t easily give up

To become a good student in physics, you have to be


The end

The End


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