IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: AN10 on January 09, 2010, 12:29:25 pm

Title: physics mcq
Post by: AN10 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

Title: Re: physics mcq
Post by: T.Q on January 09, 2010, 12:46:47 pm

ANSWER (A) IS THE COREECT ONE

Title: Re: physics mcq
Post by: astarmathsandphysics 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