Một ô tô khối lượng 3 tấn, sau khi khởi hành 10 s đi được quãng đường dài 25 m. Lực cản tác
dụng vào ô tô luôn bằng 1000 N. Tìm:
a. Lực phát động của động cơ xe.
b. Vận tốc và quãng đường xe đi được sau 20 s.
c. Muốn xe sau khi khởi hành được 10 m đạt vận tốc 10 m/s thì cần thay đổi lực phát động như thế nào?
Answers: 3
Physics, 21.06.2019 17:20, nicole667
Write maxwell's equations and discuss the terms involved and the results of each equation in classical electrodynamics. if it is possible to write these equations in integral form, give the integral forms. find the wave equation for electromagnetic waves from the maxwell equations. what is the propagation velocity of electromagnetic waves in space according to the wave equation you find?
Answers: 3
Physics, 21.06.2019 20:00, desscraft30
Which of the following represents an upright image? a. -do b. +m c. -m d. +do
Answers: 1
Physics, 22.06.2019 07:30, babygreg2001p97abr
Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?
Answers: 1
Physics, 22.06.2019 13:10, alejandramirand9836
A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)
Answers: 3
Một ô tô khối lượng 3 tấn, sau khi khởi hành 10 s đi được quãng đường dài 25 m. Lực cản tác
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