Waec Physics 2019 Past Questions and Answers

Question 26:

• WAEC 2019

A body of mass 2 kg is released from a point 100 m above the ground. Calculate its kinetic energy 80m from the point of release.

A. 1600 J
B. 900 J
C. 600 J
D. 200 J

Question 27:

• WAEC 2019

Which of the following waves is not mechanical?

A. Waves in pipes
B. Water waves
C. Radio waves
D. Sound waves

Question 28:

• WAEC 2019

A loaded spring is set in simple harmonic motion. The force that tends to restore the load to its equilibrium position is

A. Adhesive
B. Elastic
C. Frictional
D. Gravitational

Question 29:

• WAEC 2019

Which of the following cases cannot produce total internal reflection? A light ray travelling from

A. Glass to water
B. Kerosene to air
C. Air to water
D. Water to ice

Question 30:

• WAEC 2019

The vacuum in a thermoflask reduces heat loss resulting from

A. Radiation only
B. Conduction and convection only
C. Radiation and convection only
D. Conduction only