waec model questions vol1 2017 physics | Practical

Are you preparing for waec model questions vol1 exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2017 physics (Practical) questions designed to simulate the real exam environment.

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Question 1 View Details
A metal rod is supplied with a certified length of 150.0 mm. The student measures the rod using (i) a metre rule (least count 1 mm) and (ii) a vernier caliper (least count 0.02 mm). The recorded readings are: Metre rule (mm): 150, 151, 149 Vernier caliper (mm): 149.96, 150.02, 149.98 Using these data, the student is required to determine the accuracy of each instrument and comment on possible sources of error.
Question Parts
(a)
Calculate the average length obtained with the metre rule.
(b)
Calculate the absolute error and the percentage error of the metre‑rule measurement relative to the certified length.
(c)
Calculate the average length obtained with the vernier caliper, then determine its absolute and percentage errors.
(d)
State two possible sources of error in the measurements and suggest one method to minimise each.
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Question 2 View Details
A force table is set up with two known forces acting on a ring: • Force F₁ = 5.0 N directed 30° above the positive x‑axis. • Force F₂ = 8.0 N directed 120° measured counter‑clockwise from the positive x‑axis. The student must determine the resultant of F₁ and F₂ and then find the magnitude and direction of a third force that will bring the system to equilibrium.
Question Parts
(a)
Resolve each force into its horizontal (x) and vertical (y) components.
(b)
Using the components, calculate the magnitude and direction (angle measured from the positive x‑axis) of the resultant force R of F₁ and F₂.
(c)
Determine the magnitude and direction of a third force F₃ that must be applied to bring the system to equilibrium. State its components as well.
(d)
Identify one probable source of systematic error in the force‑table experiment and suggest a method to reduce it.
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Question 3 View Details
A low‑friction air‑track is set up to investigate uniformly accelerated motion of a glider. The track is inclined at an angle of 5.0° to the horizontal. The glider is released from rest at the top and the time taken to travel successive 0.20 m intervals is recorded in the table below. | Distance travelled, s (m) | Time taken, t (s) | |---------------------------|-------------------| | 0.20 | 0.64 | | 0.40 | 0.90 | | 0.60 | 1.12 | | 0.80 | 1.31 | | 1.00 | 1.48 | Using this data, answer the questions that follow.
Question Parts
(a)
Plot s (m) against t² (s²) and determine the experimental acceleration of the glider.
(b)
Theoretically, the acceleration of a body down an incline is a = g sinθ. Calculate the theoretical acceleration for the given angle.
(c)
Determine the percentage error between the experimental and theoretical accelerations.
(d)
State two possible sources of error that could have caused the experimental acceleration to be higher than the theoretical value.
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Question 4 View Details
A wooden block of mass 2.00 kg rests on a rough horizontal table. A spring balance is attached to the block and pulled horizontally. 1. The reading on the spring balance when the block is just about to move is 12.0 N. 2. The block is then pulled with a constant force of 15.0 N. It travels a distance of 0.50 m in 1.20 s. Using the above observations, answer the questions that follow.
Question Parts
(a)
Determine the coefficient of static friction (μs) between the block and the table.
(b)
Using the motion data, determine the coefficient of kinetic friction (μk).
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