Ngondo Physics

Form Four - Miscellaneous Quiz 5

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Duration: 15 minutes

Number of Questions: 10

Time Remaining: 15:00

Progress: 0 / 10

On the moon, an astronaut cannot drink juice with the help of a straw, what is the reason for this phenomenon?

A. Acceleration due to gravity on the moon is less. B. There is no atmosphere on the moon C. Juice evaporates instantaneously on the moon D. Acceleration due to gravity on the moon is greater E. Juice freezes easily on the moon

To get an enlarged and real image of an object, which of the following can either be used?

A. A convex mirror or concave lens B. A convex lens or concave mirror C. A convex lens or concave lens D. A concave mirror or convex mirror E. A convex lens or plane mirror

A goal keeper in a game of football pulls his hands backwards after holding the ball shot at the goal. What is the reason for this action?

A. To decrease the rate of change of momentum B. To exert large force on the ball C. To increase the force exerted by the ball on hands D. To exert an opposite reaction to the ball E. To exert an opposite momentum to the ball

(iv)An object is raised a few meters above the ground and then dropped. Neglecting the effect of air resistance, where in its fall will the gravitational potential energy and the kinetic energy be equal??

A. At the instant it is released B. A quarter of the way down C. Half the way down D. Three quarter of way down E. All the way down

A block of wood is pulled along a horizontal bench at constant speed of 15m/s by a force of 8 N . How much work is done against friction in 6 seconds?

A. 720 J B. 120 J C. 48 J D. 20 J E. 3.2 J

When a person walks in front of the projection beam in a cinema a black shadow is obtained on the screen. The shadow is black because

A. The beam of light is diverging from the bulb to the screen B. White light has all the colours of the rainbow C. The projection bulb is very bright D. The source of light is very small E. The body stops some light from reaching the screen

What will happen when a ship enters a sea from a river?

A. Sink a little B. Remain at the same level of draft C. Rise a little D. Rise or fall depending on whether it is of wood or steel E. Sink totally if it is made of steel

An object is put one by one in three liquids P, Q and R having different densities, consider the following statement and arrange the liquid in ascending order of densities. In liquid P the object is completely submerged, in liquid Q object floats with $\left(\frac{\text{1}}{\text{4}}\right)thth>$of their volume outside the liquid and in liquid R objects float with $\left(\frac{\text{1}}{\text{4}}\right)thth>$ of their volume inside the liquid.

A. R < Q < P B. P < Q < R C. Q < R < P D. P < R < Q E. Q < P < R

The following is not a proper sequence of energy conversion from the sun into materials

A. Sun → tree → coal B. Sun → wood → fire C. Sun → animal → crude oil D. Sun → wind → sea waves E. Sun → natural gas → animal

Which of is the correct weight of a body of mass 48g when placed on the moon surface?

A. 0.48N B. 4.80N C. 0.080N D. 0.04N E. 80.0N