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Q1. An intergalactic rock star bangs his drum every 1.52 s. A person on earth measures that time between beats is 2.10 s. How fast is the rock star moving relative to the earth?
Q2. A 6.20 g lead bullet travelling at 450 m/s is stopped by the large tree. If half the kinetic energy of bullet is transformed into internal energy and remains with the bullet even as the other half is transmitted to the tree, what is the increase in temperature of bullet?
A rifle with a barrel length of 62 cm fires a 12 g bullet with a horizontal speed of 460 m/s/s. The bullet strikes a block of wood and penetrates to a depth of 15 cm.
What is force necessary on one end of apparatus in order to lift the car? How much work is done lifting the car?
A 2.0 mL syringe has an inner diameter of 4.0 mm, the needle inner diameter of 0.21 mm, and a plunger pad diameter (where you place your finger) of 1.20 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. S..
Treating our rigid legged friend as a particle, what is the average force his feet exert on the ground as he slows down.
What is an average speed of this train
Light of wavelength 588 nm falls on a double slit. First-order bright bands appear 3.65 cm from the central bright band. The screen is 1.20 m from the slits. How far apart are the slits.
Clifford is in a real hurry, however, and skips the speed ramp. Starting from rest with an acceleration of 0.49 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. What is the speed at which belt of the ramp is moving.
A paratrooper pilot fell 360 m after jumping without his parachute opening. He landed in a snow bank, creating a crater 1.50 m deep, but survived with only minor injuries. Assume the pilot's mass was 80 kg and his terminal velocity was 50 m/s.
Megan's mass is 27 kg. She climbs the 4.8 m ladder of a slide and reaches a velocity of 3.6 m/s at the bottom of the slide. How much work was completed by friction on Megan? Imagine that air resistance is negligible.
A uniform steel beam has a mass of 1640 kg. On it is resting half of an identical beam. What is the vertical support force at each end.
A space traveller whose mass is 104kg leaves earth. What are his weight and masson earth and in interplanetary space where there are no near planetary objects.
After a tornado, a 0.55-g straw was found embedded 2.8 cm into the trunk of a tree. If the average force exerted on the straw by the tree was 70 N, what was speed of the straw when it hit the tree .
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