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Physics
A 1500 kg VW is heading 40 m/s in a straight line. A 4000 kg Cadillac is heading
directly for it at 60 m/s. Find the velocity (magnitude and direction) of the center of
mass.
directly for it at 60 m/s. Find the velocity (magnitude and direction) of the center of
mass.
Physics
An old go-kart with a mass of 300 kg is traveling in a straight line at 80 m/s. It is
followed by a 4-wheeler with mass of 200 kg moving at 60 m/s. How fast is the center
of mass moving?
followed by a 4-wheeler with mass of 200 kg moving at 60 m/s. How fast is the center
of mass moving?
Physics
a 1200 kg car travelling at 20 m/s collides with a stationary 1400 kg car. The two cars lock together. Determine the speed of the vehicles immediately after the collision if 53.9% of the initial kinetic energy is converted to heat.
Physics
a nail on a vertical wall is pulled by means of a cord attached to his head if he called make an angle of 60 degree to the horizontal it exerts the force of 18 Newton on the nail a. Find the effective force which tends to pull the nail out of the wall b. Find the force which tends to bend the nail
A jet lands on an aircraft carrier at 140 mi/h ( ).
(a.) What is its acceleration if it stops in 2.0 s?
(b.) What is the displacement of the plane while it is stopping?
(a.) What is its acceleration if it stops in 2.0 s?
(b.) What is the displacement of the plane while it is stopping?
Physics
If 150cm3 of steam at 100∘C is added to 250cm3 water at 40∘C, how much steam(in cm3) is condensed into water at 100∘C?
Physics
A 54g copper calorimeter contains 80cm3 at 20∘C. A very cold 110g copper cylindrical sample is dropped into the water causing the water to partially freeze, with 5cm3 being converted to ice. The final temperature of the system is 0∘C. What is the initial temperature in Kelvins of the cylindrical sample?
For part 3 of 3, just enter magnitude (positve number) A 1720 kg car has a speed of 10.3 m/s when it hits a tree. The tree doesn’t move and the car comes to rest. Find the change in kinetic energy of the car. Answer in units of J. 008 (part 2 of 3) 10.0 points Find the amount of work done by the car as its front is pushed in. Answer in units of J. 009 (part 3 of 3) 10.0 points Find the magnitude of the force that pushed the front of the car in by 50 cm . Answer in units of N.
Physics
A 1.2 kg rock attached to a string is whirled clockwise in a horizontal circle on a frictionless surface.
The rock moves 8.7 m, moving from point A to point D, and completes five revolutions in a time of 7.2 s.
Determine the magnitude of the force of tension in the string.
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The rock moves 8.7 m, moving from point A to point D, and completes five revolutions in a time of 7.2 s.
Determine the magnitude of the force of tension in the string.
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Physics
A bush pilot wants to fly her plane to a lake that is 250.0 km [N 30.0° E] from her starting point. The plane has an air
speed of 210.0 km/h, and the wind is blowing east at 40.0 km/h.
a) In what direction should she head the plane to fly directly to the lake?
b) Determine her velocity relative to the ground.
c) How long will it take her to reach her destination?
(Note: You must use the sine law and cosine law to answer this question)
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speed of 210.0 km/h, and the wind is blowing east at 40.0 km/h.
a) In what direction should she head the plane to fly directly to the lake?
b) Determine her velocity relative to the ground.
c) How long will it take her to reach her destination?
(Note: You must use the sine law and cosine law to answer this question)
SHOW ALL WORK
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#340153 on Dec 2023
#340153 on Dec 2023