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A car accelerates uniformly from rest for 20 seconds with anacceleration of 1.5m/s2. It then travels at a constantspeed for 2 minutes before slowing with a uniform deceleration tocome to rest in a further 10 seconds. Sketch a velocity-time grahof this motion (not to scale) and find:
(a) the maximum speed
(b) the total distance travelled
(c) the acceleration while slowing down.
a ball is thrown straight up in the air with a velocity of 40 ms. what is the speed of the ball right before it hits
At this point you are getting very tired and would like to get back as quickly as possible, but all of the available trails seem to lead you deeper into the woods. You would like to take a shortcut directly through the woods (ignoring the trails)...
Lasers are used extensively in eye surgery to remove unwanted material from the eye or reshape the eye lens. If this energy is delivered to a spot on the eye that is 1.0 mm in diameter, what is the intensity during a pulse
Two atomic particles approach each other in a head-on collision. Each particle has a mass of 1.81 x 10-25 kg. The speed of each particle is 2.13 x 108 m/s when measured by an observer standing in the laboratory.
Draw a sketch that shows the distribution of dipoles in a ferromagnetic solid in zero applied magnetic field. Illustrate what is the name given to internal interaction acting on the dipoles
What is the coefficient of friction for the surface?
A spring is hanging from the ceiling. Attaching a 440gg mass to the spring causes it to stretch 18.0cmcm in order to come to equilibrium. What is the maximum speed of the mass
a bucket filled with water has a mass if 54 kg and is hanging from a rope that is wound around a 0.050 m radius
A parallel-plate vacuum capacitor has 6.36 J of energy stored in it. The separation betweenthe plates is 2.20 mm. If the separation is decreased to1.85 mm,
A spring with spring constant 40N/m is attached to the ceiling, and a 5.5-cm-diameter, 1.5kg metal cylinder is attached to its lower end. what length of the cylinder is submerged
An undersea research chamber is spherical with an external diameter of 4.60m . The mass of the chamber, when occupied, is 51100kg. What is the buoyant force on the chamber
In a binary star system, two stars have elliptical orbits about the center of mass of the system. what is the change in the gravitational potential energy of the system
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