AIEEE 2004 | Work Power & Energy Question 121 | Physics

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

$${{m{v_1}{t^2}} \over {{T}}}$$

$${{mv_1^2t} \over {T^2}}$$

$${{m{v_1}t} \over {{T}}}$$

$${{mv_1^2t} \over {{T}}}$$

AIEEE 2003

MCQ (Single Correct Answer)

-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

$$12.50$$ $$N$$-$$m$$

$$18.75$$ $$N$$-$$m$$

$$25.00$$ $$N$$-$$m$$

$$625$$ $$N$$-$$m$$

AIEEE 2003

MCQ (Single Correct Answer)

-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

$$0.2$$ $$J$$

$$10$$ $$J$$

$$20$$ $$J$$

$$0.1$$ $$J$$

AIEEE 2003

MCQ (Single Correct Answer)

-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

$${t^{3/4}}$$

$${t^{3/2}}$$

$${t^{1/4}}$$

$${t^{1/2}}$$