Answer all the questions in the spaces provided. (i) Define acceleration. (ii) State Newton’s first law of motion. (b) The variation with time $t$ of vertical speed $v$ of a parachutist falling from an aircraft is shown in Fig. 1.1. (i) Calculate the distance travelled by the parachutist in the first $3.0\ \text{s}$ of the motion. distance = \_\_\_\_\_\_ $\text{m}$ (ii) Explain the variation of the resultant force acting on the parachutist from $t = 0$ (point A) to $t = 15\…

Physics 9702/21 — October/November 2012

Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme

questions

marks

minutes

Topics Electricity · Kinematics · Dynamics · D.C. Circuits · Physical Quantities and Units · Forces, Density and Pressure · +3 more

Q1KinematicsDynamicsFree sample

Answer all the questions in the spaces provided.

(a)

(i)

Define acceleration.

(ii)

State Newton’s first law of motion.

(b)

The variation with time $t$ of vertical speed $v$ of a parachutist falling from an aircraft is shown in Fig. 1.1.

Fig. 1.1

(i)

Calculate the distance travelled by the parachutist in the first $3.0\ \text{s}$ of the motion.

distance = ______ $\text{m}$

(ii)

Explain the variation of the resultant force acting on the parachutist from $t = 0$ (point A) to $t = 15\ \text{s}$ (point C).

(iii)

Describe the changes to the frictional force on the parachutist

(iv)

The mass of the parachutist is $95\ \text{kg}$ .

Calculate, for the parachutist between $t = 15\ \text{s}$ (point C) and $t = 17\ \text{s}$ (point D),

acceleration = ______ $\text{m s}^{-2}$

frictional force = ______ $\text{N}$

5 more questions

Loading the full paper…