Physics Question: Answer the following
What are the parts and the function of each part of the telephone?
What is Telecommunications?
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Wednesday, January 27, 2010
Tuesday, January 12, 2010
Physics Class: Problem Sets in Physics (Mechanics)
Physics Questions: Problem sets in Physics
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Direction: Answer the following PHYSICS problems. Show all pertinent solutions.
1. An antelope moving with constant acceleration covers the distance between two points 80.0 m apart in 7.00s. Its speed as it passes the second point is 20.0 m/s. a) What is its speed at the first point? b) What is the acceleration?
2. The catapult of the aircraft carrier USS Abraham Lincoln accelerates an F/A – 18 Hornet jet fighter from rest to a take-off speed of 170 mi/h in a distance of 320 ft. Assume constant acceleration. a) Calculate the acceleration of the fighter in m/s2. b) Calculate the time required for the fighter to be accelerated to take-off speed.
3. An airplane travels 500m down the runway before taking off. If it starts from rest, moves with constant acceleration, and becomes airborne in 8.98 s, what is its speed in m/s, when takes off?
4. If a flea can jump straight up to a height of 0.525 m, what is its initial speed as it leaves the ground? b) For how much time is it in the air?
5. A player kicks a ball with a velocity of 42 m/s, 37ยบ from the horizontal. Find:
a. the maximum height the ball could reach.
b. the time to reach the maximum height.
c. the time the ball is in the air.
d. the range.
6. A crate with a mass 42.5 kg initially at rest on a warehouse floor is acted on by a net force of 140N. a) What acceleration is produced? B) How far does the crate travel in 11.0 s? c) What is its speed at the end of 11.0s?
7. A stockroom worker pushes a box with mass 11.6 kg on a horizontal surface with a constant speed of 3.40 m/s. The coefficient of kinetic friction between the box and the surface is 0.22. a) What horizontal force must be applied by the worker to maintain the motion? b) If the force calculated in part (a) is removed, how far does the box slide before coming to rest?
8. A stone with a mass of 0.81 kg is attached to one end of a string 0.90 m long. The string will break if its tension exceeds 600N. The stone is whirled in a horizontal circle on a frictionless table top; the other end of the string is kept fixed. Find the maximum speed the stone can attain without breaking the string.
9. A soccer ball of mass 0.430 kg is initially moving with speed 2.00 m/s. A soccer player kicks the ball, exerting a constant force of magnitude 40.0 N in the same direction as the ball motion. Over what distance must her foot be in contact with the ball to increase the ball’s speed to 6.10 m/s?
10. A mail bag with a mass of 130 kg is suspended by a vertical rope 6.5 m long. a) What horizontal force is necessary to hold the bag in position displaced sideways 3.0m from its initial position? b) How much work is done by the worker in moving the bag to this position?
ENJOY PHYSICS CLASS
SOLVE THE FOLLOWING PHYSICS QUESTIONS AND SUBMIT IT TO YOUR PHYSICS CLASS ON JANUARY 20, 2010 TO YOUR PHYSICS TEACHER.
ENJOY PHYSICS!
Direction: Answer the following PHYSICS problems. Show all pertinent solutions.
1. An antelope moving with constant acceleration covers the distance between two points 80.0 m apart in 7.00s. Its speed as it passes the second point is 20.0 m/s. a) What is its speed at the first point? b) What is the acceleration?
2. The catapult of the aircraft carrier USS Abraham Lincoln accelerates an F/A – 18 Hornet jet fighter from rest to a take-off speed of 170 mi/h in a distance of 320 ft. Assume constant acceleration. a) Calculate the acceleration of the fighter in m/s2. b) Calculate the time required for the fighter to be accelerated to take-off speed.
3. An airplane travels 500m down the runway before taking off. If it starts from rest, moves with constant acceleration, and becomes airborne in 8.98 s, what is its speed in m/s, when takes off?
4. If a flea can jump straight up to a height of 0.525 m, what is its initial speed as it leaves the ground? b) For how much time is it in the air?
5. A player kicks a ball with a velocity of 42 m/s, 37ยบ from the horizontal. Find:
a. the maximum height the ball could reach.
b. the time to reach the maximum height.
c. the time the ball is in the air.
d. the range.
6. A crate with a mass 42.5 kg initially at rest on a warehouse floor is acted on by a net force of 140N. a) What acceleration is produced? B) How far does the crate travel in 11.0 s? c) What is its speed at the end of 11.0s?
7. A stockroom worker pushes a box with mass 11.6 kg on a horizontal surface with a constant speed of 3.40 m/s. The coefficient of kinetic friction between the box and the surface is 0.22. a) What horizontal force must be applied by the worker to maintain the motion? b) If the force calculated in part (a) is removed, how far does the box slide before coming to rest?
8. A stone with a mass of 0.81 kg is attached to one end of a string 0.90 m long. The string will break if its tension exceeds 600N. The stone is whirled in a horizontal circle on a frictionless table top; the other end of the string is kept fixed. Find the maximum speed the stone can attain without breaking the string.
9. A soccer ball of mass 0.430 kg is initially moving with speed 2.00 m/s. A soccer player kicks the ball, exerting a constant force of magnitude 40.0 N in the same direction as the ball motion. Over what distance must her foot be in contact with the ball to increase the ball’s speed to 6.10 m/s?
10. A mail bag with a mass of 130 kg is suspended by a vertical rope 6.5 m long. a) What horizontal force is necessary to hold the bag in position displaced sideways 3.0m from its initial position? b) How much work is done by the worker in moving the bag to this position?
ENJOY PHYSICS CLASS
SOLVE THE FOLLOWING PHYSICS QUESTIONS AND SUBMIT IT TO YOUR PHYSICS CLASS ON JANUARY 20, 2010 TO YOUR PHYSICS TEACHER.
Sunday, January 3, 2010
Physics Class Question: Momentum
Physics questions
What is Momentum?
What are the to types of Collision
See you in my Physics Class!
What is Momentum?
What are the to types of Collision
See you in my Physics Class!
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