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Q. To qualify for the finals in a racing event, a race car must achieve an average speed of 250 km/h on a track with a total length of 1600 m. If a particular car covers the first half of the track at an average speed of 210 km/h, what minimum average speed must it have in the second half of the event in order to qualify?
Q. A gold puck has a mass of 12 kg and a velocity of 5i-4j m/s prior to a collision with a stationary blue puck whose mass is 18 kg. After the collision ,the blue puck has a velocity of 2i-2j. What is the velocity of the gold pack after the collision?
At sea level, at latitude where, the pendulum that takes 2.00s for a complete swing back and forth has a length of 0.993m. What is the value of g in m/s2 at the location where the length of such a pendulum is 0.970m.
What direction is white dot on the sensor pointing
A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, plates are disconnected from the battery. define the behavior of the ball.
A 50.0g silver spoon at 20.0c is placed in a cup of coffee at 90 c. How much heat does spoon absorb from the coffee to reach a temperature of 89c.
An astronaut in a satellite says she can just barely resolve two point sources on the Earth, 110km below. Assume λ=540nm, and the pupil diameter of the astronaut's eye to be 5.20mm.
A tennis ball with a speed of 13.20 m/s is moving perpendicular to a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 10.36m/s.
Discover the least value of initial velocity
A 1200 N uniform boom is supported by a cable perpendicular to the boom, as in Figure P8.28. The boom is hinged at the bottom, and a 2000 N weight hangs from its top. Find out the tension in the supporting cable and the components of the reaction ..
A 150 g ball and a 250g ball are connected by a 35{rm cm}-long, massless, rigid rod. The balls rotate about their center of mass at 150 rpm.
The resolution of the eye is ultimately limited by pupil diameter. What is the smallest diameter spot an eye can produce on the retina if pupil diameter is 4.45? Assume light with a wavelength of = 600 .
What fraction of incident intensity is transmitted by system
Two heavy pendula of mass m are suspended from strings of length l inside a railroad car of mass M that can roll freely on horizontal tracks (ignore the moment of inertia of the wheels).
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