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Struck from behind, a 950-kg stopped car accelerates from rest to 40km/h in 75 ms. Typically, a person's head makes up 6.0% of their body weight. Assume human's mass is 65kg .
Part A What horizontal force on the head would accelerate it along with the rest of the body? Express your answer in newtons.
Part B Express your answer as a multiple of the head's weight.
King Arthur's knights fire cannon from the top of the castle wall. The cannonball is fired at a speed of 60 m/s and an angle of 33. A cannonball that was accidentally dropped from the top of the castle wall hit the moat below in 1.80s.
What is corresponding free energy change
A charge particle of mass .0020kg is subjected to a 6 T magnetic field which is acts as a right angle to its motion. if the particle moves in a circle of radius .20m at a velocity of 5.0 m/s. what is the magntiude of the charge on the particle.
A uniform plank of length 5.5 m and weight 205 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support .To what distance x can a person who weighs 447-N walk on the overhanging part of the plank before it just ..
Two 9.00 µC charged particles are located on the x axis. One is at x = 1.00 m, and the other is at x = -1.00 m, Determine the electric field on the y axis at y = 0.500 m
The wave is travelling to the right at 50.0 m/s. What is the amplitude if the highest displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m.
A .228g wires are stretched between two points 77.20 cm apart. The tension in the wire is 618N. Find the frequency of the first harmonic. Reply in units of Hz.
A flower pot fell of a windowsill and falls past the window below. you may ignore air resistance. it takes the pot .470s to pass the window, which is 1.80m hight. how far is the top of window below the windowsill from w/c the flower pot fell.
Find the capacitance of the cable for a 100 m length of coaxial cable with radii 0.831618mm and 1.98341 mm. The permittivity of a vacuum is 8.8542 × 10^?12 C^2/N · m^2
The dipole moment of a water molecule in liquid water is 6.2×10-30 C•m, and the effective diameter of the water molecule is 2.8×10-10 m. In an earlier homework problem the effective dipole charge separation for water was calculated as 1.9×10-11 m.
An aluminium block of mass m1 = 3.45 kg and a copper block of mass m2 = 6.30 kg are connected by a light string over a frictionless pulley. They sit on a steel surface, where θ = 40.0°
determine the mass of liquid ammonia that boils away before thermal equilibrium. Assume an excessive amount of liquid ammonia is present and that the liquid ammonia does not react with the copper.
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