Physics Force & Laws Of Motion Level: Misc Level
A 300 N crate is pushed across the room at 2 m /s. When the pushing stops,, the crate comes to rest in 3 seconds. How large is the force of friction on the crate?
Physics Force & Laws Of Motion Level: Misc Level
A 10 Ib bowling ball rolls down the lane and collides with a 5 Ib bowling ball. If the heavier ball pushes the smaller ball with a 30 N force, what is the force exerted on the 5 Ib bowling ball?
Physics Force & Laws Of Motion Level: Misc Level
A raft travelling down a flume has a total mass of 1000 kg. When the raft hits the water it is moving at 6 m /s, but comes to stop quickly. The water gives a drag force of 3000 N. How long in seconds does it take the raft to stop?
Physics Force & Laws Of Motion Level: Misc Level
A crate slides quickly down a ramp covered with sand. Draw a diagram of the box on the ramp. Label the 3 forces acting on the box, Show their direction. Show the direction of the next force on the box.
Physics Force & Laws Of Motion Level: Misc Level
A crate slides quickly down a ramp covered with sand. Draw a diagram of the box on the ramp. Label the 3 forces acting on the box, showing their direction. Show the direction of the next force on the box.
Physics Rotational Mechanics Level: Misc Level
A massless meterstick has a 5 kg ball attached at each end. How much torque will be needed to give the meterstick a rotational acceleration of 6 rad /s^2 about its midpoint?
Physics Rotational Mechanics Level: Misc Level
A wooden plank is 2 meters long. One end is resting atop a deck, while someone holds the other end up. 40 I b s of stone are sat 0.6 m away from the end that someone is holding up. Ignoring how much the plank weighs, how much force does the person have to exert to hold their end up?
Physics Force & Laws Of Motion Level: Misc Level
A 5 kg mass has been put on of a vertical spring. When the mass comes to rest the spring has been compressed 7 cm (0.07 m ).How much upward force does the spring exert on the mass?
Physics Rotational Mechanics Level: Misc Level
A Sit and Spin Wheel has a radious of 0.3 m and a rotational inertia of 15 kg m ^2. If a 10 N force is applied along the outer edge, what will the rotational acceleration be?
Physics Heat & Thermodynamics Level: Misc Level
How much heat must be removed from 200 g of water initial at a temperature 30 C to convert it completely to ice at 0 C? Assume c water =1.0 kcal / (kg. C )and L f ice =80.0 k cal /kg.
Physics Measurements Level: Misc Level
What is the Kelvin equivalent of 37 o F?
Physics Properties Of Matter Level: Misc Level
Given that seawater has a mass density of 1,030 kg /m 3, how far must a submarine submerge below the surface for the pressure on the top of the vechcle to be five times that of air at sea level.Which is Po =1.01325 x10 5 N /m2 ?
Physics Properties Of Matter Level: Misc Level
Liquid Mercury has a mass density of 13.595.086 kg /m 3 at 20 C. What volume would 2.75 kg of Mercury under these conditions would occupy?
Physics Heat & Thermodynamics Level: Misc Level
A 1 kg sample of wood absorbs 10 kcal of heat and its temperature is found to rise from 20.0C to 44. 0 C.What is the specific heat of the wood?
Physics Electromagnetic Waves Level: Misc Level
Treat each of your eyes as a circular aperture of diameter 3.5 m m. Light of wavelength 500 n m is used to view two point sources that are 114 m distant from you. How far apart must these two point sources be if they are just resolved by your eye? Assume that the resolution is diffraction limited, use Rayleigh s criterion.
