Study resources on Kenyaplex

Get ready-made curriculum aligned revision materials

Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.

Or go directly to:

Class notes Holiday assignments Topical questions Other resources

A swimer takes off straight up from a diving board 1.80 m above water surface in a pool and falls into the swimming pool. If her...

A swimer takes off straight up from a diving board 1.80 m above water surface in a pool and
falls into the swimming pool. If her initial velocity is 5 m/s , determine
a. The highest point above the board
b. Her velocity as she hits the water
c. The time she takes to hit the surface of water

Answers

A sketch will help visualize the problem

a. The highest point above the board
Get time first

b. Her velocity as she hits the water
Total distance travelled form the highest point is 1.8+1.25=3.05 m
Using the third equation,

c. The time she takes to hit the water surface
Time taken to highest point=0.5 s
Time taken from highest point to water

sharon kalunda answered the question on April 10, 2019 at 13:29

Answer Attachments

Next: A cat was seen to jump over a chair 1.50 m high. Considering just its vertical motion,

Previous: An athlete swims from the east end to the west end of a 75 m pool in 25 s and makes the return trip to...

View more Physics Questions and Answers | Return to Questions Index

Exams With Marking Schemes

Related Questions

A cat was seen to jump over a chair 1.50 m high. Considering just its vertical motion, (Solved)

A cat was seen to jump over a chair 1.50 m high. Considering just its vertical motion,
a. Calculate its take off vertical velocity
b. How long does it stay in the air?

Date posted: April 10, 2019 . Answers (1)
A trolley covers a distance of 275 m moving with uniform acceleration of 10 ms^-2. If its initial velocity was 30 ms^-1. Calculate its final... (Solved)

A trolley covers a distance of 275 m moving with uniform acceleration of 10 ms^-2. If its initial velocity was 30 ms^-1. Calculate its final velocity.

Date posted: April 10, 2019 . Answers (1)
Using a ticker-timer that vibrates at a frequency of 50 Hz, a student carried out an experiment to study the motion of a trolley.The figure below... (Solved)

Using a ticker-timer that vibrates at a frequency of 50 Hz, a student carried out an experiment
to study the motion of a trolley.The figure below shows a tape chart consisting of 10-tick strips that
he obtained.

Calculate the
a. total distance travelled
b. average velocity
c. acceleration of the trolley

Date posted: April 10, 2019 . Answers (1)
The figure below shows ticker tape chart for a trolley pushed up a slope. Every section of the tape contains 5 spaces. If the ticker-tape timer... (Solved)

The figure below shows ticker tape chart for a trolley pushed up a slope. Every section of the tape
contains 5 spaces. If the ticker-tape timer has a frequency of 50 Hz, determine the
acceleration of the trolley.

Date posted: April 10, 2019 . Answers (1)
The figure below shows a ticker-tape for trolley moving over an inclined plane, a frequency of 50Hz. (Solved)

The figure below shows a ticker-tape for trolley moving over an inclined plane, a frequency
of 50Hz.

Calculate,
a. Initial velocity
b. Final velocity
c. Acceleration of the trolley

Date posted: April 10, 2019 . Answers (1)
The ticker-tape in Figure below was produced by a toy car moving over an inclined plane. If the ticker-tape timer produced 100 dots per second, find... (Solved)

The ticker-tape in Figure below was produced by a toy car moving over an inclined plane.
If the ticker-tape timer produced 100 dots per second, find the

a. Initial velocity at A
b. Final velocity at B
c. Acceleration of the toy car.

Date posted: April 10, 2019 . Answers (1)
The figure below shows a strip of ticker tape pulled by a moving trolley. The ticker tape timer was vibrating at 50Hz. Find the average velocity... (Solved)

The figure below shows a strip of ticker tape pulled by a moving trolley. The ticker tape timer
was vibrating at 50Hz. Find the average velocity of the trolley.

Date posted: April 10, 2019 . Answers (1)
The figure below shows an approximate velocity-time graph for a vehicle. (Solved)

The figure below shows an approximate velocity-time graph for a vehicle.

Using the graph, determine;
a. The value of the acceleration in region BC
b. The total distance travelled
c. The average velocity for the whole journey

Date posted: April 10, 2019 . Answers (1)
A car is brought to rest from 20m/s in 2 seconds. Determine (Solved)

A car is brought to rest from 20m/s in 2 seconds. Determine
a. Its acceleration
b. The magnitude of acceleration
c. Its deceleration

Date posted: April 10, 2019 . Answers (1)
A ship cruises 370 km towards east in in 10 hours. It then changes course southwards covering165 km in 5 hours. Determine (Solved)

A ship cruises 370 km towards east in in 10 hours. It then changes course southwards covering
165 km in 5 hours. Determine
a. Total displacement of the ship.
b) The average speed of the ship.
c. The average velocity of the ship

Date posted: April 10, 2019 . Answers (1)
The half-life of a radio-active substance is 138 days. A sample of the substance has 8 x 10¹⁰ un-decayed nuclei at time t = 0.... (Solved)

The half-life of a radio-active substance is 138 days. A sample of the substance has 8 x 10¹⁰ un-decayed nuclei at time t = 0. How many un-decayed nuclei will be left after 690 days?

Date posted: April 5, 2019 . Answers (1)
One of the application of Beta emission (B) is controlling thickness gauge. Explain how they are used for this purpose? (Solved)

One of the application of Beta emission (B) is controlling thickness gauge. Explain
how they are used for this purpose?

Date posted: April 5, 2019 . Answers (1)
Th disintegrates into radium (Ra) by emission of two alpha and two beta particles as in equation. (Solved)

Th disintegrates into radium (Ra) by emission of two alpha and two beta particles as in equation.

State
i) The atomic number of the daughter nuclide
ii) The mass number of the daughter nuclide

Date posted: April 5, 2019 . Answers (1)
The diagram below shows the paths taken by three radiations A, B and C from a radio active isotope through an electric field (Solved)

The diagram below shows the paths taken by three radiations A, B and C from a radio
active isotope through an electric field

i) State the charge on plate Y
ii) Identify the radiation A and C
iii) Give a reason why C deviates move A

Date posted: April 5, 2019 . Answers (1)
Uranium 235 was bombarded with a neutron and fission took place in the following manner: (Solved)

Uranium 235 was bombarded with a neutron and fission took place in the following manner:

Determine the values of a and b

Date posted: April 5, 2019 . Answers (1)
Alpha particles have low penetrating power as opposed to beta particles. Give a reason for this (Solved)

Alpha particles have low penetrating power as opposed to beta particles. Give a reason for this

Date posted: April 5, 2019 . Answers (1)
What evidence supports the fact that gamma rays are not charged (Solved)

What evidence supports the fact that gamma rays are not charged

Date posted: April 5, 2019 . Answers (1)
Determine the value of x and y in the nuclear equation below:- (Solved)

Determine the value of x and y in the nuclear equation below:-

Date posted: April 5, 2019 . Answers (1)
A radioactive element decays to 1/128 of its original activity after 49 days. Determine its half –life (Solved)

A radioactive element decays to 1/128 of its original activity after 49 days. Determine its
half –life

Date posted: April 5, 2019 . Answers (1)
Below is a nuclear reaction (Solved)

Below is a nuclear reaction

i) Identify radiation K
ii) Determine the value of X and Y

Date posted: April 5, 2019 . Answers (1)