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Original problem: a person walks at constant speedv1 along a straight line from A to B and then back alongthe line from B to A at constant speed v2. What is theaverage speed over the entire trip?
The drawing shows two boxes resting on frictionless ramps. One boxis relatively light and sits on a steep ramp. The other box isheavier and rests on a ramp that is less steep. The boxes arereleased from rest at A and allowed to slide down the ramp..
a projectile is shot upward off a 475 m high cliff with a speed of 65m/s at an angle of 48 with respect to the horizontal. What is the velocity of the pojectile upon landing
In the above animation a massive block is attached to a spring. It is sliding back and forth on a frictionless table. The spring has a spring constant 250 N/m. Determine the mass of the block
A small glass bead has been charged to + 30{rm nC} . a)What is the magnitude of the acceleration of a proton that is 3.0{rm cm} from the center of the bead? b)What is the magnitude of the acceleration of an electron that is 3.0{rm cm} from the cen..
question1by means of snellrsquos law convince someone that for total internal reflection to happen that index of
A tetherball leans against the smooth, frictionless post to which it is attached. what is the force the pole exerts on the ball
A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. how fast will the disk be turning
What is the magnitude of the acceleration of a modified Atwood machine if the mass of the cart is 3 kg and the hanging mass is 4 kg? (Use g = 9.8 m/s2. Express your answer to one decimal point.)
A helicopter is lifting two crate simultaneously. One cable with a mass of 200.kg is attached to the helicopter by a cable. what is the tension in each of the two cables
White light illuminates an oil film on water. Viewing it directly from above, it looks red. What is the refractive index of the oil
A double speed trap is set up on a freeway. One police cruiser is hidden behind a billboard, and another is some distance away under a bridge. How far apart are the two cruisers
An aluminum rod is 23.0 cm long at 20°C and has a mass of 350 g. If 15000 J of energy is added to the rod by heat, what is the change in length of the rod
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