The fractional error \(\left( {{\triangle x}\over{x}} \right)\)  _____________.

(a)

\(\pm\left( {{\triangle x}\over{x}} \right)\)

(b)

\(\pm n\left( {{\triangle a}\over{a}}\right)\)

(c)

\(\pm n \log_e \left( {{\triangle a}\over{a}}\right)\)

(d)

\(\pm n \log_{10}{{\triangle a}\over{a}}\)

What is the resultant vectors, when 2 vectors are at right angles to each other?

(a)

\(R=\sqrt{P^2+Q^2}\)

(b)

R = P + Q

(c)

R = P - Q

(d)

\(R=\sqrt \frac{P}{Q}\)

A car starting from rest, accelerates at a constant rate x from sometimes after which it decelerates at a constant rate y to come to rest. If the total time elapsed is t, the maximum velocity attained by the car is given by ______________.

(a)

\(\frac{xy}{x+y}t\)

(b)

\(\frac{xy}{x-y}t\)

(c)

\(\frac{x^2y^2}{x^2+y^2}t\)

(d)

\(\frac{x^2y^2}{x^2-y^2}t\)

A body of mass 3 kg moves with an acceleration 2ms^-2. The change in momentum in one second is _______________.

(a)

2/3 kgms^-1

(b)

3/2  kgms ^-1

(c)

6  kgms ^-1

(d)

1.5  kgms ^-1

If the tension in the cable of 1000 kg elevator is 1000 kg weight, then the elevator _____________.

(a)

is accelerating upwards

(b)

is accelerating downwards

(c)

may be at rest or accelerating

(d)

may be at rest or in uniform motion

A simple pendulum hanging freely and at rest vertical because in that position ______________.

(a)

Kinetic Energy is zero

(b)

Kinetic Energy is minimum

(c)

Potential Energy is zero

(d)

Potential Energy is minimum

Consider a system of two identical particles. One is at rest and the other has an acceleration \(\overrightarrow { a } \). The centre of mass has an acceleration ______________.

(a)

1/2\(\overrightarrow { a } \)

(b)

\(\overrightarrow { a } \)

(c)

2\(\overrightarrow { a } \)

(d)

Zero

Kepler's second law regarding constancy of aerial velocity of a planet is consequence of the law of conservation of________.

(a)

energy

(b)

angular momentum

(c)

linear momentum

(d)

None of these

Internal energy comprises of two types of energies, those are ________________.

(a)

mechanical and electrical energy

(b)

magnetic and electrical energy

(c)

kinetic and potential energy

(d)

kinetic and magnetic energy

Ultrasonic waves are those waves which _______.

(a)

human beings cannot hear

(b)

human beings can hear

(c)

have high velocity

(d)

have large amplitude