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Chapter 1 - Measurements & Uncertainties

Paper 1

2016-2024

In the International System of Units (SI), which option represents a basic unit?

1.1 - Kinematics

1.1 - Measurements In Physics

question 6.svg

They will have travelled the same distance.

The car will have travelled further than the truck.

The truck will have travelled further than the car.

Given the velocity-time graphs of a car and a truck that are initially beside each other at time t = 0, what is true about the distances each vehicle has traveled since t = 0 at time T?

1.3 - Vectors & Scalars

question 7.svg

\(a\over 4\)

\(a\over 3\)

\(a\over 2\)

a &nbsp;

If a small tow-truck can accelerate with a maximum acceleration &#39;a&#39; on a level road by itself, what would be its maximum acceleration while towing a van that is twice its own mass? Assume no frictional effects.

1.2 - Forces & momentum 

Among the following options, which represents a scalar quantity?

&plusmn;6%.

&plusmn;9%.

&plusmn;16%.

&plusmn;19%.

Given that the power P dissipated in a resistor with resistance R and current I&nbsp;is expressed by

 
P = I2&nbsp;R,

 
and considering a specific resistor with a &plusmn;10% uncertainty in resistance and a &plusmn;3% uncertainty in current, what is the most accurate estimation for the uncertainty in the power dissipated?

1.2 - Uncertainties & Errors

How can the impact of errors be minimized through multiple measurements of a particular value?

question 2.svg

As the angle &theta; of vector v increases from 0&deg; to 90&deg; relative to the x-axis, how do its x and y components change?

1

2

3

4

What is the appropriate number of significant figures to express the density of an object if its mass is measured as 4.652 kg and its volume as 2.1m3?

&plusmn; 2%

&plusmn; 4%

&plusmn; 6%

&plusmn; 8%

Based on the measured values and their uncertainties shown in the diagram, what is the most accurate estimation of the percentage uncertainty in the calculated area of the rectangular plate with its sides measured?

1.3 - Work, energy & power

20 days

40 days

60 days

80 days

If nuclide X decays to stable nuclide Y with a half-life of 20 days and is currently in a 1:1 ratio with Y, how long will it take for the ratio to change to 1:3?

Physics SL

IB Questions