ASU PHY 101- Adams prep for final- review of old test Q's – with accurate answers (verified)Graded A

two objects are dropped from rest at the same time, and from the same height, in a vacuum. which of the following statements is true? - Answers-the two objects will hit the ground at the same time and with the same speed when a 50 kg person is standing at the surface of the earth, what is the strength of the force on that person by the earth? - Answers-50 x 9.8 (gravity constant) = 490N a ball is thrown upward from the surface of the earth at a speed of 19.6 m/s. the amt of acc due to gravity at this location is 9.8 m/s^2 ignore air resistance. at the instant when the ball is at the top of its motion, the acc of the ball is...? - Answers-9.8 m/s^2 DOWN how many nucleons are inside a larger eather balloon containing helium gas if the mass of the gas is 40kg? - Answers-mass of nucleon (constant) = 1.67 x 10-27 kg/nuc we want answers in nucleons so we must do 40kg/ 1.67E-27 kg/nuc = 2.4E28 nucelons in lecture demonstration, we charged 2 pieces of scotch tape by 1st sticking them together then making them neutral and then pulling them apart. as a result, one piece has a negative charge and one has a positive charge the positively charged pieces of tape has... - Answers-some atoms with too few electrons consider the point charge and dipole as drawn (+) (-) (+) the strength of the force on the negative charge of the dipole by the point charge is 50 mN. the strength of the force on the pos charge of the dipole by the point charge is ... - Answers-a little less than 50 mN (use draw the arrows) block moving on ice question (use for Q8 too)- worker pushes the block horizontally across floor, the contact force on the block by the workers hand is also horiz. when you first look at the worker and as long as you are looking, the block is moving to the right at constant speed. which statement is true about the strength of the pushing force by the worker and the strength of the frictional force on the block by the floor? - Answers-the two forces must be EQUALLY strong (not to be confused with the answer option- "the workers force must be equal to the friction plus the weight of the block) based on the previous info, the force on the block by the worker's hand is an example of: - Answers-electromagnetic force a crate is riding on the floor of an elevator, near the beginning of an upward trip, the elevator is going up and speeding up. as this instant compare the