An object is dropped from rest on the Earth from a height of 2.0 m . The same object is dropped from rest on the Moon from twice the height. The acceleration of free fall on the Moon is approximately $$$16 \%$$$ of the value on the Earth. Assume that there are no resistive forces acting on the object. What is the ratio $$$\frac{\text { speed of the object just before hitting the surface on the Earth }}{\text { speed of the object just before hitting the surface on the Moon }} ?$$$

1.8

2.5

3.1

3.5

Physics

IGCSE&ALevel

CAIE

Exam No：9702_w24_qp_11 Year：2024 Question No：13

Answer:

Knowledge points:

3.1.1 define and use distance, displacement, speed, velocity and acceleration

3.1.2 use graphical methods to represent distance, displacement, speed, velocity and acceleration

3.1.3 determine displacement from the area under a velocity-time graph

3.1.4 determine velocity using the gradient of a displacement-time graph

3.1.5 determine acceleration using the gradient of a velocity-time graph

3.1.6 derive, from the definitions of velocity and acceleration, equations that represent uniformly accelerated motion in a straight line

3.1.7 solve problems using equations that represent uniformly accelerated motion in a straight line, including the motion of bodies falling in a uniform gravitational field without air resistance

3.1.8 describe an experiment to determine the acceleration of free fall using a falling body

3.1.9 describe and explain motion due to a uniform velocity in one direction and a uniform acceleration in a perpendicular direction

Answer:

Knowledge points:

Solution:

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