1
AIEEE 2004
+4
-1
A force $$\overrightarrow F = \left( {5\overrightarrow i + 3\overrightarrow j + 2\overrightarrow k } \right)N$$ is applied over a particle which displaces it from its origin to the point $$\overrightarrow r = \left( {2\overrightarrow i - \overrightarrow j } \right)m.$$ The work done on the particle in joules is
A
$$+10$$
B
$$+7$$
C
$$-7$$
D
$$+13$$
2
AIEEE 2004
+4
-1
A body of mass $$' m ',$$ acceleration uniformly from rest to $$'{v_1}'$$ in time $${T}$$. The instantaneous power delivered to the body as a function of time is given by
A
$${{m{v_1}{t^2}} \over {{T}}}$$
B
$${{mv_1^2t} \over {T^2}}$$
C
$${{m{v_1}t} \over {{T}}}$$
D
$${{mv_1^2t} \over {{T}}}$$
3
AIEEE 2004
+4
-1
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle, the motion of the particles takes place in a plane. It follows that
A
its kinetic energy is constant
B
is acceleration is constant
C
its velocity is constant
D
it moves in a straight line
4
AIEEE 2003
+4
-1
A wire suspended vertically from one of its ends is stretched by attaching a weight of $$200N$$ to the lower end. The weight stretches the wire by $$1$$ $$mm.$$ Then the elastic energy stored in the wire is
A
$$0.2$$ $$J$$
B
$$10$$ $$J$$
C
$$20$$ $$J$$
D
$$0.1$$ $$J$$
EXAM MAP
Medical
NEET