1
AIEEE 2003
+4
-1
A spring of spring constant $$5 \times {10^3}\,N/m$$ is stretched initially by $$5$$ $$cm$$ from the unstretched position. Then the work required to stretch it further by another $$5$$ $$cm$$ is
A
$$12.50$$ $$N$$-$$m$$
B
$$18.75$$ $$N$$-$$m$$
C
$$25.00$$ $$N$$-$$m$$
D
$$625$$ $$N$$-$$m$$
2
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
$$0.1$$ $$J$$
3
AIEEE 2003
+4
-1
A body is moved along a straight line by a machine delivering a constant power. The distance moved by the body in time $$'t'$$ is proportional to
A
$${t^{3/4}}$$
B
$${t^{3/2}}$$
C
$${t^{1/4}}$$
D
$${t^{1/2}}$$
4
AIEEE 2002
+4
-1
A ball whose kinetic energy E, is projected at an angle of $$45^\circ$$ to the horizontal. The kinetic energy of the ball at the highest point of its height will be
A
E
B
$${E \over {\sqrt 2 }}$$
C
$${E \over 2}$$
D
zero
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