CIE iGCSE Co-Ordinated Science P1.3 Mass and weight Exam Style Questions Paper 1
Question
The weight of an object of mass m is given by the expression mg.
Which row gives the units for weight and g?
▶️Answer/Explanation
Ans : D
Question
Which row gives the units for mass m and gravitational field strength g ?
▶️Answer/Explanation
Ans: A
Question
In a room, hot air above a heater rises and is replaced by cool air that falls. What is the name of this process, and how does the density of the hot air compare with the density of the cool air?
▶️Answer/Explanation
Answer: D
Explanation: The process described is convection, where hot air rises because it is less dense than cool air. As the hot air rises, it is replaced by cooler, denser air that falls. Therefore, the correct answer is D, which states that the process is convection and the density of hot air is less than that of cool air.
Question
A man has a mass of 80 kg. The gravitational field strength \( g \) is 10 N/kg.
What is the man’s weight?
A) 8.0 N
B) 80 N
C) 800 N
D) 8000 N
▶️Answer/Explanation
Answer: C) 800 N
Explanation: Weight is calculated using the formula: \[ \text{Weight} = \text{mass} \times \text{gravitational field strength} \] Substituting the values: \[ \text{Weight} = 80\, \text{kg} \times 10\, \text{N/kg} = 800\, \text{N} \]