Other Physics Answers

A car starts from rest and accelerates uniformly over a time of 5.21 seconds for a distance of 110 m. Determine the acceleration of the car.

1.     A 85.0-kg person climbs stairs, gaining 2.750 m in height. Find the work done to accomplish this task.

State one design feature that would ensure that the thermometer measured the desired range of temperature

The rod in the figure shown is made of two materials. Each conductor has a square crosssection 5mm on a side. The first material has a resistivity of 8x10-3Ω-m and is 35cm long, while the second material has a resistivity of 10x10-3Ω-m and is 50cm long. What is the resistance of the rod?

A parallel plate capacitor is given a charge of 5x10-8C. The space between the plates is filled with dielectric having a permittivity of 5.43x10-11F/m and the electric field within the dielectric is 5.81x106V/m. What is its plate area?

A tiny 0.8g ball carries a charge of magnitude 10μC. It is suspended by a thread in a downward 500N/C electric field. What is the tension in the thread if the charge on the ball is positive?

1.An object moves in a straight line starting from rest.There are two stages in the journey

(a)it gains speed uniformly for 2.0s and attains a speed of 8.0ms-1

(b)it continues at this speed for a further 1.5

Draw a sketch graph of speed against time

Find(1)the acceleration in stage (a)

(2)the acceleration in stage (b)

(3)the total distance moved during stages (a)and(b)

Use the picture of a cart of mass m moving on a roller coaster as well

as the accompanying information to answer the following question.The

section of track displayed is frictionless and composed entirely of

semicircular pieces of radius r.The letters A through E refer to

specific locations along the track. if r=12 meters,and if the cart's

velocity at point A is 3 meter per second,what is the cart's velocity

at point D? Round off your answer to nearest tenth of a meter per

second.

Explain what is meant by the term a constant 9.8m/s

A car starts from rest and accelerates uniformly for 10 seconds until attains a velocity of 25m/s. It then travels with a uniform velocity for 20 seconds, before decelerating uniformly to rest in 5 seconds. Calculate the 

i) Acceleration during the first 10 seconds 

ii) Deceleration during the last

iii) Sketch a graph of the motion.

iv) Calculate the total distance covered throughout the motion