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1.) How much impulse does a 10 N force produce if it is applied in 0.05s?
2.) A 0.80kg object at rest is given a force of 4.0N during a time interval of 2.0s What is the velocity of the object at the end of this time interval ?
3.) A 5.0kg ball rolls into a pillow at 2.0 m/s and stops in 5.0s, what is the average force exerted on the pillow?
4.) A 1500kg car moving east speeds up uniformly from 5.0 m/s to 30m/s in 8.0s. What constant force acts on the car
5.) How long must a 1500N force act on a 50kg cart to increase its speed from 50 m/s to 150 m/s
6.) A 300g ball moving at 20 m/s is hit by a bat. After the impact, the ball rebounds at the same speed along the same line. What was the impulse exerted by the bat on the ball?
What is the differences between these two equations?
1- "\\upsilon"x = "dx\/dt"
and
2- "\\upsilon"x = "\u2202x\/\u2202t"
In my book there are equations use d and others use ∂.
Please tell me the differences.
The following are sports/events that utilizes the concept of torque. Briefly explain how this concept is used.
1. Volleyball
2. Bodybuilding
3. Arm wrestling
4. Golf
5. Running
6. Car Racing
A body moves through a distance of 5 m and force of 2 n is applied on it calculate the magnitude of the work done on it
The 0.5kg sphere to the right is immersed in a gravitational field created by a planet with a mass of 2x10^20kg and a radius of 3x10^4m. What is the strength of the field at the surface of the planet?
6 sports/events that utilizes the concept of Torque
A solid sphere of mass M and radius R is attached to a horizontal spring of spring constant k and the sphere rolls without slipping along a horizontal surface. The system is released from rest when the spring is stretched by a length d.The system then undergoes a simple harmonic motion. x = 0 is the equilibrium position.
(a) Find the magnitude of velocity of the center of mass of the sphere when it passes
the equilibrium position in terms of some or all of the following - k, x, M, R and d.
(b) Find an expression for the time period of the simple harmonic motion.
(c) Write down the general equation of simple harmonic motion for this system. Draw
position vs time, velocity vs time and acceleration vs time plots.
A lagging pipe carries saturated steam at a pressure of 40bars at a temperature of 25°C. Inside pipe diameter is 0.18m and outside pipe diameter is 0.29. Calculate heat loss through the lagging per meter length given coefficient of thermal conductivity for lagging is 1.2Kw/m°C
Explain how it is created, using the figure at the left as a visual aid: When the source is as fast or faster than the speed of sound in air, the wave fronts pile up in front of the source. These piled up waves correspond to a loud sound that we hear as the sonic boom.
https://commons.wikimedia.org/wiki/File:Transonico-en.svg - (the third figure supersonic speed)
Which of the following is NOT TRUE about X-rays? I
(A) Highly energetic collision can cause the inner
electrons to transit between high energy level and low
energy level.
(B) Hard X-rays could be used in deep tissue therapy.
(C) The penetration capability of X-rays can be
improved by the increase of the tube voltage.
(D) The X-rays from an X-ray tube are with a single
wavelength.
