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A boy of mass 60kg jumps of a building of height 3.2m. Calculate the time and velocity with which he would fall to the ground. Also calculate the acceleration with which he would fall if his weight was reduced to how much he would have weighed if he was on the moon. (g = 10m/s2)
A hockey puck B rests in a smooth ice surface and is struck by a second puck A,
which was originally traveling at 40.0 m/s and is deflected 30.0° from its original
direction. The pucks have the same mass. (a) Compute the speed of each puck after
the collision. (b) What fraction of the original kinetic energy of puck A dissipates
during collision?
aqual and opposite charges a certain distance apart are called an electric "dipole*. A
positive test charge +q is placed as shown, equidistant from the two charges.
Q
O
Which diagram below gives the direction of the net force on the test charge? (B)
D)
16. A hydrogen nucleus, which has a charge , is situated to the left of a carbon nucleus, which has
a charge 6e. Which statement is true?
A) The elextrical force experienced by the hydrogen nucleus is to the right, and the magnitude
is equal to the
force exerted on the carbon nucleus.
B) The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude
is less than the force exerted on the carbon nucleus,
) The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude
is greater than the force exerted on the carbon nucleus.
D) The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude
is equal to the force exerted on the carbon nucleus.
What is the total impedance at 20kHz of a series circuit consisting of a 1.5mH inductance, a 100Ω resistance, and a 0.08μF capacitance?
A ball is thrown making an angle of 30 degrees above the horizontal with a velocity of 20m/s from the top of a building 50m high. Calculate
(i) The time of flight (ii) The horizontal range. (iii) The velocity with which it hits the ground. (g= 10m/s²)
a body quadruples its momentum when its speed doubles what was the initial speed as fraction of c of the body
Solve the following ordinary differential equations:
a) 3d²y/dx²+dy/dx-14y=0 ; y(0)=1 , y'(0)=1
An object is being shot from a horizontal ground at an incline angle of 30 degree with respect to the ground at a speed of 46 m/s. Find the duration in seconds that the object is above the height of 19 m. Give your answer with one decimal place.
The shelf hangs from the ceiling by two ropes. A block of cheese rests on the shelf. A free-body diagram for this situation looks like?
A cup is sliding down an inclined surface that is not smooth. A free-body diagram for this situation looks like?
