Which of the following statements about the motion of a simple pendulum is true?

• A. It is a simple harmonic motion when the angle of displacement is large
• B. It passes the equilibrium position with minimum speed
• C. It possesses maximum kinetic energy at the extreme positions
• D. lt swings faster at the poles than at the equator

simple harmonic oscillator has a period of 0.02s and amplitude of 0.25m. Calculate the speed in ms^-1 at the centre of the oscillation

• A. 125\(\pi\)
• B. 25.00\(\pi\)
• C. 100.00 \(\pi\)
• D. 400.00\(\pi\)

Uniform speed occurs when there is equal change of

• A. distance in equal times
• B. displacement in equal times
• C. velocity in equal times
• D. acceleration in equal times

Which of the following statements about distance and displacement is not correct?

• A. Displacement is a vector quantity.
• B. Distance has dimension
• C. Displacement is measured in meters.
• D. Distance is a vector quantity

An object of volume 1 m³ and mass 2kg is totally immersed in a liquid of density 1 kgm^-3 . Calculate its apparent weight.

• A. 20N
• B. 10N
• C. 2N
• D. 1 N

(a) State two factors on which surface tension depends.

(b) How can mosquito larvae be made to sink in stagnant water?

Which of the following surfaces will absorb radiant heat energy?

• A. white
• B. red
• C. black
• D. blue

A ball, P, is released from the roof of a building at the same time as another ball, Q, is thrown vertically upward from the base of the building. Which of the following statements is correct?

• A. The acceleration of P is greater than that of Q and both are in the same direction.
• B. The acceleration of P is less than that of Q and both are in the same direction.
• C. The acceleration of P is equal to that of Q and both are in the same direction.
• D. The acceleration of P is equal to that of Q and are in opposite directions.

Copper of thickness d is plated on the cathode of a copper voltameter. If the total surface area of the cathode is 60 cm\(^2\) and a steady current of 5.0 A is maintained in the voltameter for 1 hour. calculate the value of d. [density of copper = 8.9 x 10\(^3\)kg m\(^{-3}\) electro chemical equivalent of copper = 3.3 x 10\(^{-7}\) kg C\(^{-1}\)

Which of the following are True for \(\alpha\)-decay. i. mass number, decrease by four. ii. Atomic number decreases by two. iii. mass number does not change.

• A. i and ii only
• B. ii and iii only
• C. i and iii only
• D. i, ii, and iii only