Waec Physics 2007 Past Questions and Answers

Question 11:

• WAEC 2007

A body accelerates uniformly from rest at 2ms^-2. Calculate the magnitude of its velocity after travelling 9m

A. 4.5 ms^-1
B. 6.0ms^-1
C. 18.0^-1
D. 36.0^-1

Question 12:

• WAEC 2007

A swinging pendulum between the rest position and its maximum displacement possesses

A. Kinetic energy only
B. Potential energy only
C. Gravitational energy only
D. Both kinetic and potential energy

Question 13:

• WAEC 2007

A block of mass 4.0kg causes a spiral spring to extend by 0.16m from its unstretched position. The block is removed and another body of mass 0.50kg is hung from the same spiral spring. If the spring is then stretched and released, what is the angular frequency of the subsequent motion? [g = 10 ms ^-2]

A. 10\(\sqrt 5\) rads^-1
B. 5\(\sqrt 2\) rads^-1
C. 5 rads^-1
D. \(\sqrt 5\) rads^-1

Question 14:

• WAEC 2007

An external force of magnitude 100N acts on a particle of mass 0.15kg for 0.03s. Calculate the change in the speed of the particle

A. 50ms^-1
B. 25ms^-1
C. 20ms^-1
D. 5ms^-1

Question 15:

• WAEC 2007

A car of mass 800kg moves from rest on a horizontal track and travels 60m in 20s with uniform acceleration. Assuming there were no frictional forces, calculate the accelerating force

A. 240.0N
B. 800.0N
C. 1600.00N
D. 2400.0N