Question 4631:

• NECO 2009

A sound wave from a ship is received 8.4s later. What is the depth of the sea? [Speed of sound in water 1500ms^-1]

A. 0.179km
B. 0.357km
C. 3.150km
D. 6.300km
E. 12.600km

Question 4632:

• NECO 2009

A stone is thrown with a speed of 10ms at an angle of 30° to the horizontal, Calculate its time of flight, (g = 10ms²)

A. 0.5s
B. 1.0s
C. 1.7s
D. 2.0s
E. 3.4s

Question 4633:

• NECO 2009

A projectile attains its maximum height when the angle of projection is ____________

A. 30°
B. 45°
C. 60°
D. 75°
E. 90°

Question 4634:

• NECO 2009

Inertia is the property of a body which makes the body to ____________

A. Accelerate
B. Be reluctant to move when at rest
C. Experience friction when moving
D. Move randomly
E. Retard

Question 4635:

• NECO 2009

The term torque means ____________

A. The equilibrant of two concurrent forces
B. The moment of a force about an ads
C. The resultant of several forces acting on a body in equilibrium
D. Two coplanar forces at right angle to each other
E. Two equal and opposite forces whose lines of action do not coincide