EdgineerX

2001. The component of the weight of a body along an incline of angle theta is

A. mg tan theta B. mg C. mg cos theta D. mg/sin theta E. mg sin theta

2002. A body resting in a position such that any small displacement raises its centre of gravity is in

A. dynamic equilibrium B. no equilibrium C. neutral equilibrium D. stable equilibrium E. unstable equilibrium

2003. The point at which the entire weight of a body may be considered to act is the

A. metacentre B. centre of gravity C. centre of mass only in space D. point of suspension E. centroid of the surface

2004. A torque that tends to produce anticlockwise rotation is conventionally taken as

A. undefined B. equal to the force C. positive D. zero E. negative

2005. The impulse delivered to a body equals the area under a graph of

A. force against displacement B. force against time C. velocity against time D. acceleration against time E. momentum against time

2006. Airbags and seat belts reduce injury in a collision by

A. increasing the time over which the momentum changes B. increasing the force on the passenger C. reducing the mass of the passenger D. reversing the momentum E. reducing the change in momentum

2007. Two cars travel in the same direction at 30 m s-1 and 20 m s-1. The velocity of the first relative to the second is

A. zero B. 50 m s-1 C. 600 m s-1 D. 25 m s-1 E. 10 m s-1

2008. The thrust developed by a rocket depends on the rate of ejection of gases and their

A. pressure at the nozzle only B. density at sea level C. colour D. exhaust speed relative to the rocket E. temperature only

2009. A block slides down a frictionless incline of angle 30 degrees. Its acceleration is about

A. zero B. 8.5 m s-2 C. 2.45 m s-2 D. 9.8 m s-2 E. 4.9 m s-2

2010. For a projectile, the vertical component of velocity at the instant of landing on level ground is

A. equal in magnitude to the initial vertical component B. equal to the horizontal component C. twice the initial vertical component D. maximum at the top E. zero

2011. The work done by gravity on a body carried around a closed path and returned to its starting point is

A. positive B. equal to the kinetic energy C. negative D. zero E. equal to mgh

2012. Which of the following is a non-conventional energy source?

A. petroleum B. tidal energy C. furnace oil D. natural gas E. coal

2013. Geothermal energy is obtained from

A. burning biomass B. heat within the Earth's crust C. wind D. sunlight directly E. the tides

2014. A body slides down a smooth curved track from height h. Its speed at the bottom is

A. gh B. sqrt(gh/2) C. sqrt(2gh) D. 2gh E. sqrt(gh)

2015. The total kinetic energy of a body rolling without slipping is the sum of

A. rotational and translational kinetic energies B. angular momentum and torque C. kinetic energy and work done D. translational kinetic energy and potential energy E. two rotational kinetic energies

2016. For a satellite in a stable circular orbit, the required centripetal force is provided by

A. the thrust of its engines B. atmospheric pressure C. magnetic forces D. gravitational attraction of the Earth E. the normal reaction

2017. The instrument used to measure blood pressure is the

A. sphygmomanometer B. manometer C. hydrometer D. venturimeter E. barometer

2018. Normal systolic and diastolic blood pressures for a healthy adult are about

A. 80 and 120 mm of mercury respectively B. 12 and 8 mm of mercury C. 760 and 120 mm of mercury D. 200 and 100 mm of mercury E. 120 and 80 mm of mercury respectively

2019. The work required to increase the surface area of a liquid is stored as

A. pressure energy B. kinetic energy C. surface energy D. heat only E. elastic energy of the container

2020. A streamline in steady fluid flow is a line such that

A. the pressure is constant along it B. two streamlines may cross C. the tangent at every point gives the direction of the fluid velocity there D. the density varies along it E. the fluid speed is constant along it

2021. Simple harmonic motion may be regarded as the projection on a diameter of

A. uniform circular motion B. a parabolic path C. a damped decay D. a straight line motion E. random motion

2022. The maximum acceleration of a body in SHM of amplitude x0 and angular frequency omega is

A. omega x0 B. omega squared x0 C. omega squared divided by x0 D. omega x0 squared E. x0 divided by omega

2023. The time period of a simple pendulum is independent of

A. its length B. the square root of the length C. the value of g D. the mass of the bob E. the location on Earth

2024. When a transverse pulse on a string is reflected from a rigid support, it undergoes a phase change of

A. 270 degrees B. 90 degrees C. 0 degrees D. 360 degrees E. 180 degrees

2025. If the distance from a point source of sound is doubled, the intensity becomes

A. unchanged B. half C. one quarter D. double E. four times

Mixed Practice