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An athlete executing a long jump leaves the ground at a 30.8 angle and travels 7.62m.
1. What was the takeoff speed?
2. If this speed were increased by just 4.0%, how much longer would the jump be?
What is the intensity of the sound waves at point.
a body of 2kg is suspended from the ceiling of an elecator moving up with an accelration g. find the apparant weight of
An astronaut has a heart rate of 65 beats/min as measured with monitor on the spaceship. What will the heart rate be as measured with an earth observer when the astronaut’s spaceship goes by the earth at a speed of 0.60 c?
Suppose you're skiing up a 20m tall slope at the indicated angle of inclination. What minimum initial speed must you have at the bottom to just make it to the top
The earth spins on its axis once a day and orbits the sun oncea year (365.24 days). Determine its angular velocity as it revolves around the sun
a charged drop with a mass of 0.25 g is levitated by an electric field directed away from the earth of 860 nc. what is
a 5.00-kg steel ball is dropped onto a copper plate from a height of 10.0 m. if the ball leaves a dent 3.20 mm deep
A projectile is launched with 200 kg m/s of momentum and 1000 J ofkinetic energy. What is the mass of the projectile
A proton at the origin is moving in the positive x direction at 3.7x10^4 m/s, and at that moment the electric field is 7.9x10^3 N/C, What is the electromagnetic force on the proton at that moment
a 250-kg motorcycle goes around an unbanked turn of radius 13.7m at a steady 96.5 km/h. What is the magnitude of the net force on the motorcycle?
Disturbed by speeding cars outside his workplace, Nobel laureate Arthur Holly Compton designed a speed bump (called the "Holly hump") and had it installed. Suppose a 1 800-kg car passes over a hump in a roadway that follows the arc of a circle of rad..
Eyeglass lenses can be coated on the inner surfaces to reduce the reflection of stray light to the eye. If the lenses are medium flint glass of refractive index 1.62 and the coating is fluorite of refractive index 1.432,
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