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Q. A 70 kg bicyclist rides his 7.8 kg bicycle with a speed of 16 m/s. How much work must be done by the brakes to bring the bike and rider to a stop?
How far does the bicycle travel if it takes 3.5 s to come to rest?
Q. A hockey puck moving along the +x axis at 0.44 m/s collides into another puck that is at rest. The pucks have equal mass. The first puck is deflected 37 below the +x axis and moves off at 0.35 m/s. Find the speed and direction of the second puck after the collision.
A particle with a charge of q = -5.10 nC is moving in a uniform magnetic field of vec{B}=( -1.24 T ) hat{z}. The magnetic force on particle is measured to be vec{F}= ( -7.60×10-7 N )hat{y}.
A 2.5 mol sample of helium gas initially at 300 K and 0.400 atm is compressed isothermally to 1.30 atm. Note down that the helium behaves as an ideal gas.
If you had been tasked to remove the water from New Orleans after Hurricane Katrina would you select a radial flow, mixed flow or axial flow pump for this purpose? Explain it briefly.
define the hazards for astronauts inside any spacecraft moving in the vicinity of a pulsar.
Two trains, each having a speed of 28 km/h, are headed at each other on the similar straight track. A bird that can fly 56 km/h flies off the front of one train, when they are 66 km apart and heads directly for the other train. On reaching the other ..
A simple harmonic oscillator consists of a block of mass 4.kg attached to a spring of spring constant 153 N/m. When t = 2 s, the position and velocity of the block are x = +0.129 m and v = +3.415 m/s.
What effect will increase in temperature from 25 degree Celsius to 32 degree Celsius of the metal metre stick have on the measurement of the dimension of rectangular block? Why are corrections not generally essential for this effect.
Each speaker produces a tone with a frequency of 200 Hz on a day when the speed of sound is 330 m/s. The person is 1.65 m from one speaker and 4.95 m from the other. What sort of interference does the person sense.
In one design, the large spring with spring constant 2.0×10^4 was placed behind the cannon. The other end of the spring braced against a post that was firmly anchored to the ship's frame.
Find out the sum of these four vector forces: 12N to the right at 35.0° above the horizontal, 31.0 N to the left at 51.5° above the horizontal, 7.45N to the left at 35.0° below the horizontal, and 24N to the right at 48.0° below the horizontal.
What is the speed of the center of mass
Two blocks are connected by a string. The smooth inclined surface makes an angle of 35 degrees with the horizontal, and the block on the incline has a mass of 5.7 kg . The mass of the hanging block is = 2.9 kg.
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