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Two cars are headed right at each other. The car heading east started from rest and has an acceleration of 3.8 m/s/s. The car is moving west at a steady 19 m/s. If the cars are initially 120 m apart, how long will it take before they collide?
an engine, a piston oscillates with simple harmonic motion so that its position varies according to the expression, x = 3.00 cos 3t + ? divide by 4, Find the period and amplitude of the motion
Presume the child remains horizontal during the fall to the floor. Note that a more complicated fall could result in a head velocity greater or less than the speed you calculate.
A transformer takes 120V (RMS) from a household circuit and drops it to supply a secondary circuit at 8V (RMS) to power a dorbell at 3.75A (RMS). What is the peak current in the primary coil of the transformer
A3.50-kg block starts from rest at the top of a 30.0° incline and slides a distance of1.90m down the incline in1.80s. Find the magnitude of the acceleration of the block
An ideal heat engine absorbs 98.6 kJ of heat and exhausts 81.6 kJ of heat in each cycle. How much work is done in a cycle
Find the direction and magnitude of the net electrostatic force exerted on the point charge q2 in the figure below. Let q = +2.4 µC and d = 35 cm
the reason that massive neutrinos were considered as a candidate for solving the missing mass problem is that at the
A simple pendulum consists of a ball connected to one end of a thin brass wire. Determine the change in the period of the heated pendulum
Force from crutches. A patient with a broken leg stands using a pair of crutches. The crutches support 75% of the 81 kg patient's weight. Find the force each crutch applies to the patient
A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. Calculate the angular acceleration of the pottery wheel
A 54 kg ice skater is moving at 39 m/s when she grabs theloose end of a rope, the opposite end of which is tied to apole. What is the ratio of this force to her weight
1200 kg car at velocity 25m/s brakes and stop moving after 40m. What is the coefficient friction between the tires and road
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