A 0.15 kg ball is thrown upward and reaches a height of 7 m. What will its KE

be when it falls back down, just before it hits the ground?

A. 1.1J

B. 1.5 J

C. 10.3 J

D. 15 J

Which fundamental forces s the unification of two forces? A. Weak nuclear force B. Strong nuclear force C. Electromagnetic force D. Gravity

A student is standing in an elevator that is accelerating downward. The force that the student exerts on the floor of the elevator must be (1) less than the weight of the student when at rest (2) greater than the weight of the student when at rest

What is the weight on earth of a person with a mass of 50 kilograms

At one instant, the center of mass of a system of two particles is located on the x-axis at 2.0 cm and has a velocity of (5.0 m/s) ˆx. One of the particles is at the origin. The other particle has a mass of 0.

How do stars radius compare with their mass

A tube, open at only one end, is cut into two shorter (nonequal) lengths. The piece that is open at both ends has a fundamental frequency of 422 Hz, while the piece open only at one end has a fundamental frequency of 666 Hz.

Table tennis the path of a table-tennis ball after being hit and hitting the surface of the table can be modeled by the function h=-4.9t (t-0.42) where h is the height in meters above the table and t is the time in seconds.

A coat rack weighs 65.0 lbs when it is filled with winter coats and 40.0 lbs when it is empty. The base of the coat rack has an area of 452.4 in2.

An initially stationary object experiences an acceleration of 6 m/s2 for a time of 15 s. How far will it travel during that time?

How was helium first discovered? mining of the radioactive element uranium using spectral analysis of the Suns' emission spectra o hubble obtaining samples from explosions off the surface of the sun deep sea mining off the coast of Texas