Leaving Cert Physics.

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Question 1 · Both levels

Accelerating force and acceleration of a trolley, total mass kept constant.
Force F / N	Acceleration a / m s⁻²
0.20	0.24
0.40	0.51
0.60	0.74
0.80	1.02
1.00	1.24

To verify Newton's second law, a student measures the acceleration of a trolley for five accelerating forces, keeping the total mass being accelerated constant. The results are in the table. The student plots acceleration on the y-axis against force on the x-axis and draws the best-fit straight line through the origin. What is the gradient, and what does it represent?

Nine sections, both levels

Nature of science, measurement and models

Unifying strand

Motion and vectors

1.1

Forces, momentum and pressure

1.2 and 1.3

Energy, gravitation and circular motion

1.4 to 1.6

Heat and temperature

2.1

Waves, sound and light

2.2 to 2.7

Electric charge, fields and circuits

3.1 to 3.3

Magnetism and electromagnetic induction

3.4 to 3.6

Atomic and nuclear physics

4.1 to 4.6

Paper	Time	Weight
Written examination	2 hours 30 minutes (sample papers)	60%
Physics in Practice Investigation	Up to 20 hours in school	40%

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