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- 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)
- The velocity of a bike increases from 20 m/s to 30 m/s through a distance of 100 m.
Calculate the time the bike takes to reach...(Solved)
The velocity of a bike increases from 20 m/s to 30 m/s through a distance of 100 m.
Calculate the time the bike takes to reach this 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, initially at rest accelerates to 30 m/s in 5 seconds. It the then maintains the same
velocity for 22 minutes before slowing down to...(Solved)
A car, initially at rest accelerates to 30 m/s in 5 seconds. It the then maintains the same
velocity for 22 minutes before slowing down to rest in 3 seconds. Using a graph sketch
determine;
a. Acceleration of the car
b. Distance covered
Date posted: April 10, 2019. Answers (1)
- A car, initially moving at 90 km/h slows down to 36 km/h approaching a bump. Determine
the retardation of the car.(Solved)
A car, initially moving at 90 km/h slows down to 36 km/h approaching a bump. Determine
the retardation of the car.
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 vehicle moving with a uniform acceleration of 3 m/s2 has a velocity of 5 m/s at a certain
time. What will its velocity be 3...(Solved)
A vehicle moving with a uniform acceleration of 3 m/s2 has a velocity of 5 m/s at a certain
time. What will its velocity be 3 s later?
Date posted: April 10, 2019. Answers (1)
- Jeff, on his motorcycle, is initially moving with a velocity of 12 m/s. He then accelerates
uniformly at a rate of 2.5 m/s2 for 5 seconds....(Solved)
Jeff, on his motorcycle, is initially moving with a velocity of 12 m/s. He then accelerates
uniformly at a rate of 2.5 m/s2 for 5 seconds. Calculate his final velocity
Date posted: April 10, 2019. Answers (1)
- A race car is accelerated uniformly from 20 m/s to 41 m/s in 3 seconds. Determine the
acceleration of the car.(Solved)
A race car is accelerated uniformly from 20 m/s to 41 m/s in 3 seconds. Determine the
acceleration of the car.
Date posted: April 10, 2019. Answers (1)
- Mary throws a tennis ball on a wall at a velocity of 12 m/s. The ball bounces off at a velocity
of 8 m/s. Determine the...(Solved)
Mary throws a tennis ball on a wall at a velocity of 12 m/s. The ball bounces off at a velocity
of 8 m/s. Determine the change in velocity.
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)