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You decide to relive your childhood years, playing with toy cars and trucks, by launching your real car down the road using a large spring. Your car has a mass of 1500kg and a coefficient of friction of 0.050 with the ground. You purchase a 2.0m long spring for the job, and compress it until it is 0.75m long.
You measure the speed of your car as it leaves the spring to be 22m/s. What is the spring constant of the spring?
If the gravitational potential energy of a 30.7-kg rock is 643 J relative to a value of zero on the ground, how high is the rock above the ground
A frictionless plane is 10.0 m long and inclined at 34.0°. A sled starts at the bottom with an initial speed of 5.90 m/s up the incline. Determine the initial speed of the second sled
Pictured on the right are two point charges Q1 = -80.0 x 10 C and Q 30.0 x 10-6 C separated by a distance D = 0.100 m, as shown. Calculate the potential at point A positioned d = 0.0400 m to the left of Q1.
A motorboat traveling on a straight course slows uniformly from 60 km/h to 40 km/h in a distance of 50 m. What is the boat's acceleration
For a base current of 10 μA, what is the value of collector current in common emitter if βdc= 100
Find the net force on the Moon (mM = 7.35 × 1022 kg) due to the gravitational attraction of both the Earth mE = 5.98 × 1024, Determine the direction of the net force
a suspicious-looking man runs as fast as he can along a moving sidewalk from one end to the other taking 2.00 s. then
A guitar string of length L =1 is pulled upward at the middle so that it reaches height h. What is the subsequent motion of the string if it is suddenly released
If the mass of the child and sled is 40 kg, what is the magnitude of the average force you need to apply to stop the sled?
A 10,000 kg railroad car is rolling at 2 m/s when a 400 kg load of gravel is suddenly dumped in. What is the railroad cars speed just after the gravel is dumped in.
Cost of electricity varies but typical values are around $0.15/kWh. Using this price, calculate the cost of making a piece of toast in 3.00 min with a 980W toaster
Calculate the molar mass of the unknown. Density of acetone is 0.7851 g/mL and the value of ebullioscopic constant Kb may be found in Table 8.2.
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