2. Standing on a balcony, you throw your keys to the ground. 1 second after you release the keys, they have an instantaneous velocity of 13.9 meters per second directed at 45 degrees below the horizon. What is the initial velocity of the keys?

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Q: Remember PE- mgh Solve the probtems below 1. A cart at the top of a 200 m hil has a mass of 60 kg.…

A: Given:Mass, m=60 kgHeight from ground, h=200 m To determine:Gravitational potential energy.

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A: The expression of work- energy theorem,

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Q: Trial h2 Ah GPE %diff (J) m t KE (kg) (m) (m) (m) (m) (s) (m/s) (J) 1 1.0 0.05 0.56 0.20 0.36 0.021…

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A: The torque is given as, τ=τosinθθ1=0o=0 radθ2=110o=1.92 rad

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Q: An object has a mass of 4kg. Calculate its potential energy 3m above the ground.

A:

Q: How much work is done by a 59 kg ninja watrior in climbing a ladder that is 9 meters long? Express…

A: Mass of ninja warrior (m) = 59 kg  Length of ladder (L) = 9 m

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A: We need to know how fast the bullet was moving after it broke through the door.

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Q: Simplify Derivation + Integration

A: To Find :  Find the work done and do the calculation in detail

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Q: I performed a lab using a toy car to go down a ramp that was positioned at different heights. For…

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Q: -1 A satellite is in an elliptical orbit with a semi major axis of 8000km and an eccentricity of…

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A: Given, A satellite of mass m=3.6kg orbits in a radius of 300km above the Earth's surface.

Q: Discuss the origin of the unit horsepower.

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A: Find the solution in image attached below.

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A:

Q: A 50 kg. diver gets ready to dive from a 10 meter high diving board. how much gravitational…

A: Given that,Mass of diver : m = 50 (kg)Height : h = 10 (m)Here we need to find the potential energy…

Q: A coil has an inductance of 3.00 mH, and the current through it changes from 0.200 A to 1.50 A in a…

A: Given that,Inductance, L=3.00 mHChange in current, dI=1.50A-0.200A=1.300 AChange in time, dt=0.200…

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Q: Show that when potential energy can be writhe A Ve UoG) and Uz Energy of a closed conservatioh…

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Q: An object weighing 32 lb stretches a spring 2ft in equilibrium. There is also a damping force with c…

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Q: A typical adult ear has a surface area of 1.90 x 10³ m². The sound intensity during a normal…

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Q: A trough is 4 meters long, 2 meters wide, and 3 meters deep. The vertical cross-section of the…

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A: Horizontal range of projectile fired from the height is as follows: R=uxTR=ucosθT…

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Q: ove the bar is 1.5 m/s.

A: