1
IIT-JEE 1994
MCQ (Single Correct Answer)
+1
-0.25
A block of mass 0.1 is held against a wall applying a horizontal force of 5 N on the block. If the coefficient of friction between the block and the wall is 0.5, the magnitude of the frictional force acting on the block is:
A
2.5 N
B
0.98 N
C
4.9 N
D
0.49 N
2
IIT-JEE 1980
MCQ (Single Correct Answer)
+3
-0.75
A ship of mass 3 $$ \times $$ 107 kg initially at rest, is pulled by a force of 5 $$ \times $$ 104 N through a distance of 3 m. Assuming that the resistance due to water is negligible, the speed of the ship is
A
1.5 m/s
B
60 m/s
C
0.1 m/s
D
5 m/s
3
IIT-JEE 1980
MCQ (Single Correct Answer)
+3
-0.75
A block of mass 2 kg rests on a rough inclined plane making an angle of $$30^\circ $$ with the horizontal. The coefficient of static friction between the block and the plane is 0.7. The frictional force on the block is
A
9.8 N
B
0.7$$ \times $$9.8$$ \times $$$$\sqrt 3 $$ N
C
9.8$$ \times $$$$\sqrt 3 $$ N
D
0.7$$ \times $$9.8
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