Waec Physics 2015 Past Questions and Answers

Question 11:

• WAEC 2015

In a school compound a girl walks 40km due east from the laboratory to the staff room to submit her report. Then she returns and walks 30m due north to her classroom. Determine the magnitude of her displacement from the10m laboratory

A. 10m
B. 35m
C. 50m
D. 70m

Question 12:

• WAEC 2015

Two strings each inclined at an angle 30^o to the horizontal are used to hold a bucket of water weighing 20N. Calculate the tension i n each string.

A. 20\(sqrt{3}\)N
B. 20N
C. 10\(sqrt{3}\)N
D. 10N

Question 13:

• WAEC 2015

A bullet fired vertically upwards reaches a height of 500m. Neglecting air resistance, calculate the magnitude of the initial velocity of the bullet. [g = 10ms^-2]

A. 500.0ms^-1
B. 100.0ms^-1
C. 70.0ms^-1
D. 50.0ms^-1

Question 14:

• WAEC 2015

A uniform bar AB is balanced on a knife-edge which is 60cm from B by a mass of 22g which hangs at C 10cm from A. Calculate the mass of the bar.

A. 133.2g
B. 66.0g
C. 60.0g
D. 22.0g

Question 15:

• WAEC 2015

A body of mass 1000kg is released from a height of 10m above the ground. Determine its kinetic energy just before it strikes the ground .[g = 10ms^-2]

A. 10J
B. 10³J
C. 10⁴J
D. 10⁵J