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- From the bottom of a building, a student notices that it takes 4 s for a stone projected
upwards with to hit the ground. If the...(Solved)
From the bottom of a building, a student notices that it takes 4 s for a stone projected
upwards with to hit the ground. If the stone water released with an initial velocity of
8 m/s, find the height of the building.
Date posted: April 10, 2019. Answers (1)
- A ball is projected vertically upwards with an initial velocity of 20 m/s. Determine
a. its maximum height
b. the time taken to return to its starting...(Solved)
A ball is projected vertically upwards with an initial velocity of 20 m/s. Determine
a. its maximum height
b. the time taken to return to its starting point.
Date posted: April 10, 2019. Answers (1)
- The figure below shows a 10- tick strip ticker tape chart of for the motion of a trolley. The ticker
tape timer was connected to a...(Solved)
The figure below shows a 10- tick strip ticker tape chart of for the motion of a trolley. The ticker
tape timer was connected to a 50 Hz power supply. Which of the following statements is
true about the motion of the trolley?
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 a ticker-tape for trolley used in an experiment.(Solved)
The figure below shows a ticker-tape for trolley used in an experiment.
If the frequency of the ticker timer was 50Hz, calculate,
a. Initial velocity
b. Final velocity
c. Acceleration of the trolley
Date posted: April 10, 2019. Answers (1)
- The ticker-tape in the figure below was produced by a trolley moving over an inclined
plane. If the ticker-tape timer produced 50 dots per second, find...(Solved)
The ticker-tape in the figure below was produced by a trolley moving over an inclined
plane. If the ticker-tape timer produced 50 dots per second, find the
a. Initial velocity at P
b. Final velocity at Q
c. Acceleration of the toy car.
Date posted: April 10, 2019. Answers (1)
- A car moving at 30m/s decelerates uniformly to rest in 6 seconds. The car then
reverses back to its original starting point with a uniform acceleration...(Solved)
A car moving at 30m/s decelerates uniformly to rest in 6 seconds. The car then
reverses back to its original starting point with a uniform acceleration in 6 seconds.
On the axes provided, sketch a velocity – time graph for the whole motion.
Date posted: April 10, 2019. Answers (1)
- 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...(Solved)
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 the starting position in 28 s. calculate the,
a. Average velocity outwards
b. Average velocity back
c. Average velocity for the roundtrip
Date posted: April 10, 2019. Answers (1)
- A train increases its velocity steadily from 15 m/s to 30 m/s in 1 minute. What is its average
velocity and acceleration during this time?(Solved)
A train increases its velocity steadily from 15 m/s to 30 m/s in 1 minute. What is its average
velocity and acceleration during this time?
Date posted: April 10, 2019. Answers (1)
- Maureen, an automotive engineer, claims her car can go from 0 to 120 km/h in 5 seconds.
Determine(Solved)
Maureen, an automotive engineer, claims her car can go from 0 to 120 km/h in 5 seconds.
Determine
a. The average acceleration of her car
b. The speed of the car in km/h after 2 seconds
Date posted: April 10, 2019. Answers (1)
- A plane flies from Nakuru Airstrip to Kisumu International Airport, a distance of
approximately at 182 km an average speed of 520 km/h. The return trip...(Solved)
A plane flies from Nakuru Airstrip to Kisumu International Airport, a distance of
approximately at 182 km an average speed of 520 km/h. The return trip was made at an
average speed of 728 km/h. Find
a. Total time taken
b. The average speed for the whole journey
c. The average velocity for the whole journey
Date posted: April 10, 2019. Answers (1)
- The average velocity of an airplane is 750 km/h. Determine how long it will take to fly
between Kisumu and Mombasa, a distance of 832 km.(Solved)
The average velocity of an airplane is 750 km/h. Determine how long it will take to fly
between Kisumu and Mombasa, a distance of 832 km.
Date posted: April 10, 2019. Answers (1)
- How far will Elizabeth who is riding her new bike be after 45 minutes if she is riding at an
average speed of 28 km/h?(Solved)
How far will Elizabeth who is riding her new bike be after 45 minutes if she is riding at an
average speed of 28 km/h?
Date posted: April 10, 2019. Answers (1)
- A ball is thrown with an initial velocity of 20 m/s from height of 50 m above the ground in a
horizontal direction. Determine(Solved)
A ball is thrown with an initial velocity of 20 m/s from height of 50 m above the ground in a
horizontal direction. Determine
a. How long it takes to hit the ground
b. The horizontal distance travelled
Date posted: April 10, 2019. Answers (1)
- A stone is thrown horizontally from a height of 45 m and covers 30 m before landing. What
was the initial velocity of the stone?(Solved)
A stone is thrown horizontally from a height of 45 m and covers 30 m before landing. What
was the initial velocity of the stone?
Date posted: April 10, 2019. Answers (1)
- 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...(Solved)
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
Date posted: April 10, 2019. Answers (1)
- 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)
- Judith tosses a coin straight up in probability exercise. At what velocity must the coin be
tossed for it to rise to 2.5 m from the...(Solved)
Judith tosses a coin straight up in probability exercise. At what velocity must the coin be
tossed for it to rise to 2.5 m from the point of toss?
Date posted: April 10, 2019. Answers (1)
- Standing on a cliff, a student releases a stone. Given that the cliff is 220 m high, calculate(Solved)
Standing on a cliff, a student releases a stone. Given that the cliff is 220 m high, calculate
a. The velocity of the stone at the foot of the cliff
b. The time taken by the stone to hit the foot of the cliff
Date posted: April 10, 2019. Answers (1)
- Grace is driving at a velocity of 10 m/s. She suddenly brakes to avoid hitting a goat crossing
the road. If the car stops after a...(Solved)
Grace is driving at a velocity of 10 m/s. She suddenly brakes to avoid hitting a goat crossing
the road. If the car stops after a distance of 50 m, determine the deceleration of the car.
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)