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two forces have magnitudes of 11 newtons and 5 newtons the magnitude of their sum could not be equal to which of the following valuesa 16 newtonsb 5
a pendulum which is suspended from the ceiling of a railroad car is observed to hang at an angle of 10 degrees to the right of vertical which of
as defined in physics work is a a scalar quantityb always a positive quantityc a vector quantityd always zeroansas defined in physics work is a
the work done by a friction force is a always positiveb always negativec always zerod either positive or negative depending upon the situation ans
work is equal to which of the following a the cross product of force and displacementb the product of force times timec force divided by timed the
a boy is standing on an elevator which is traveling downward with a constant velocity of 30 meters per second the boy throws a ball vertically
for an object moving in uniform circular motion the direction of the instantaneous acceleration vector is w tangent to the path of motionx
a newton is equal to which of the following a kilogram-meter per secondb meter per second squaredc kilogram-meter per second squaredd
in the si system of measure what is the unit of capacitanceansin the si system of measure farad is the unit of
electric current may be expressed in which one of the following units a coulombsvolt b joulescoulomb c coulombssecond d
for the hydrogen atom which series describes electron transitions to the n1 orbit the lowest energy electron orbit is it thea lyman seriesb
a model to show the apparent path of the sun among the starsthe signs of the zodiac are drawn in the correct order on a strip of paper about 60 cm
making a simple refracting telescope to make a simple telescope two cardboard tubes will be needed one fitting inside the other it is not
action and reaction in a boltstep from a free row boat to land and view that the boat moves in the opposite
action and reaction with a roller skateplace a roller skate on a smooth floor step on the roller skate with one foot and take a step forward with the
action and reaction in polling forcessecure two spring balances make a loop in every end of a short piece of strong cord join a spring balance to
action and reaction in pushing forcesforces work in pairs if you push against a wall the wall pushes with equivalent force back against you secure
a light object moves fastermark off a half-metre on a table top with chalk separate this equally into centimetres secure a long rubber band and two
how to identify a hard-boiled eggsecure a fresh egg and a hard-boiled egg give every of them a spinning motion in a soup dish or a plate view that
inertia with a stoneyou will require a stone weighing about 1 kg for this experiment wrap a length of heavy string about the stone now on opposite
inertia in an automobile you can view the same effect as in experiment 8 when you are riding in a car that is rapidly stopped you have to brace
what are the basic components of lead acid cellans basic components of lead acid cells area positive plates which are tubular n shape prepared by
inertia on a bicycleget your bicycle going and then apply the brakes rapidly view the tendency of your body to stay in motion and pitch you over the
inertia with a spadescoop up a spadeful of dry earth now pitch the earth away from you view that when the spade stops the earth flies on due to
what are the basic reasons for loss of residual magnetism how do you get it what is the requireable and maximum dc voltage is to be applied to get