Please i need your help You \"weigh\" yourself on a bathroom scale at the North
ID: 1307032 • Letter: P
Question
Please i need your help
You "weigh" yourself on a bathroom scale at the North Pole and on the equator. The scale reads 730 sphere, but still rotating every day A stationary bomb explodes in gravity-free space, far away from any planets or stars. up into many smaller fragments. Which statement is true. a) Kinetic energy is conserved in the explosion b) The fragments must have equal kinetic energies. c) The sum of the kinetic energies of the fragments must be zero d) The vector sum of the moment a of the fragments must be zero The fragments's velocites point in different directions, but their speeds are same 25) Torque, which is force multiplied by a (lever arm ) distance, and work on whether displacement, are really the same kinds of thing really choice of interpretation just depends on whether you wish to analyze the rotation or the energy of the object. 26) A stick has a linear mass density that varies with location according to the formula lambda - Cx. What is the total mass of the stick if it is 4 meters long? a) 4C b) 8C c) C/4 d) C/16 e) I6C 27) Two children are on a seesaw. One's mass is 40 kg, and is located 2.5 m from the fulcrum The other's mass is 25 kg. Where must this child be to balance? a)4m b) 5 m. c)3.5 m d) 10 m. 28) Examine the figure shown, which is balancing nicely. Compare the mass of the stick to that of the rock Note: the rock is not touching the ground. a) The stick weighs more than the rock. b)The* rock weighs more than the stick. c) The stick weighs the same as the rock. Neglecting all other plants and stars, there is a point in space between the Earth and Moon where the total gravitational force on an object is zero! This is called a "Lagrange point". and is a great place to locate a satellite This is a "gifts" and is true. There is a Lagrange point between the Earth and the Sun too-and that is where NASA's Soho satellite is located; which keeps a constant vigil for solar flares that would disrupt your precious cellphone and facebook coverage. How would a great migration of people toward the Earth's equator affect Earth's rotation a) The length of a day increase tiny bit b) The length of a day decrease tiny bit c)The length of a day not change at allExplanation / Answer
23 TRUE
24 D Vector sum of momentum zero
25 they are diferent .Mathematically Torque is cross product(vector) work is dot product(scalar).
26. B Integrate
27 A m1*r1=m2*r2
28 C Equilibrium condition
30 A Moment of inertia increase angular velocity decrease