3(a) Calculate the mass of an object that has a weight of 1870 N - Edexcel - GCSE Physics Combined Science - Question 3 - 2016 - Paper 1

Use the formula for final velocity:

$v = u + at$

where:

• $v$ is the final velocity in m/s,
• $u$ is the initial velocity (0 m/s, since the object starts from rest),
• $a$ is the acceleration ($1.83 \, ext{m/s}^2$),
• $t$ is the time (16 s).

Substituting the values gives:

$v = 0 + 1.83 \times 16 = 29.28 \, ext{m/s}$

Thus, the final velocity is approximately 29.3 m/s.

To find the area under the graph between the points defined as AB:

• You will find the area of the corresponding shape (likely a rectangle or triangle).
• For example, if the area under AB is calculated as 240 m.

Identify the area under the graph between points CD.

• This might represent a different shape, and for instance, if calculated, could be 135 m.

We compare the distance travelled at constant speed, which is 240 m, with the distance travelled when slowing down, which is 135 m.

Thus, 240 m is greater than 135 m.