MRSM FIZIK K1 2023

Which of the following physical quantity is a vector quantity?

• A

• B

• C

• D

Diagram shows a graph of the change in kinetic energy of photoelectrons released from lithium metal at different light frequencies. From the graph determine the kinetic energy of lithium when its light frequency is 8X10¹⁴ Hz.

• A. 1.0 eV

• B. 1.2 eV

• C. 2.0 eV

• D. 2.2 eV

Diagram 2 shows a student run from point X to Y then back to Z.

• A

• B

• C

• D

Which of the following comparison is correct?

• A. Acceleration OA is higher than BC

• B. Acceleration OA is lower than BC

• C. Acceleration AB is higher than BC

• D. Acceleration OA is same with BC

Diagram 4 shows feather and ball bearing dropped at the same time from the same height.

• A. the density of both objects are the same

• B. the shape of both objects are the same

• C. the weight of both objects are ignored

• D. the air resistance is ignored

Answer explanation

both objects undergoes free falling.
free falling --> falls under the influence of gravitational force without air resistance.

the situation can be explained by....
complete the sentence : Newton's_______________of Motion

Why hard plastic is used?​ (a)  

• decrease time of impact
• increase weight
• absorb heat
• enhance flexibility
• increase inertia
• decrease momentum

Which statement explains the above situation correctly?

• A. the gravitational field strength on the moon is higher

• B. The weight of the space suit is lower on the moon

• C. Mass of space suit is higher on the moon

• D. The mass of the astronauts is lower on the moon.

Refer to picture

• A.

• B.

• C.

• D.

why does the rocket needs a large quantity of fuel for launching?

• A. Produce high thrust that enables the rocket to achieve the escape velocity of the Earth

• B. produce high velocity to move further

• C. produce larger momentum

• D. overcome the bigger mass of the rocket.