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Author Topic: physics mcq  (Read 787 times)

Offline AN10

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physics mcq
« on: January 09, 2010, 12:29:25 pm »
A body of mass 2 kg is moving on a horizontal surface with a speed of 1.41 m/s in a north-easterly direction. A force of 0.2 N acting in a westerly direction is applied to the body for 10 s. If friction is negligible, the body is then moving with a speed of

A    0.41 m/s in a north easterly direction
B    1.00 m/s in a northerly direction
C    1.41 m/s in a north westerly direction
D    2.24 m/s in a direction 63.4 degree east of north
E    2.41 m/s in a north easterly direction

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Offline T.Q

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Re: physics mcq
« Reply #1 on: January 09, 2010, 12:46:47 pm »
ANSWER (A) IS THE COREECT ONE
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Offline astarmathsandphysics

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Re: physics mcq
« Reply #2 on: January 09, 2010, 01:16:35 pm »
F=ma
0.2=2a so a=0.1
V=at=0.1*10=1
Initially the particle travels east with speed 1.41cos45=1 pm the two cancel out and the particle notes north with speed 1.41sin45=1
B
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