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A horizontal force of 159 N pushes a20 kg block up a frictionless incline thatmakes an angle of 35° with the horizontal.a) What is the normal force that the incline exerts on the block?b) What is the acceleration of the block? (Hint: assume up theblock as the positive direction.)
Hakeem throws a 10.50 g ball straight down from a height of 2m. The ball strikes the floor at a speed of 7m/s. What was the initial speed of the ball? Presume that air resistance is negligible.
A 5.1kg mass hanging from a spring scale is slowly lowered onto a vertical spring, as shown in the figure(Figure 1) . a.) What does the spring scale read just before the mass touches the lower spring? b.) The scale reads 25 when the lower spring has ..
If you weigh 690 {rm N} on the earth, what would be your weight on the surface of a neutron star that has same mass as our sun and a diameter of 21.0 {rm km}.
The mass of the Moon is 7.18X10^22 kg and radius is 1738 km. If your mass is 90 kg, what would be your weight (gravitational force of attraction) on the Moon
Calculate the momentum of a photon having a wavelength of 53.0 nm and Find the velocity of an electron having the same momentum
A guitar string is 90.0 cm long and has a mass of 3.23g. find the frequencies of the fundamental and first two overtones
A generator consists of one thousand loops of wire, each enclosing an area 90.cm^2, rotating 50. times per second in a uniform field of 0.15T. Determine the value of effectvie output voltage
he Sun has an orbital speed of about 220 km/s around the centre of the Galaxy, Estimate the total mass of the Galaxy in Solar masses
A 43.0-N child is in a swing that is attached to ropes 1.60 m long. Find the gravitational potential energy associated with the child relative to her lowest position at the following times.
Two friends, Al and Jo, have a combined mass of 164kg. At the ice skating rink, they stand close together on skates, at rest and facing each other.
Yellow-green light(wavelength 550nm) passes through two closely spaced very narrow slits, what is the wavelength for that second source of light.
A baseball pitcher pivots his extended arm about his shoulder joint, applying a constant torque of 190 N · m for 0.21 s to his arm, What is his arm's angular acceleration and final angular velocity
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