Question

A) Mass is less, weight is the same. B) Mass is the same, weight is less. C) Both mass and weight are less. D) Both mass and weight are the same. 25. An astronaut weighs 99 N on the Moon, where the acceleration of gravity is 1.62 m, does she weigh on Earth? A) 16 N B) 61 N C) 99 N D) 600 N E) 440 N 26. A net force of 125 N is applied to a certain object. As a result, the object accelerates with acceleration of 24.0 m/s. The mass of the object is A) 3000 kg B) 2880 kg. C) 144 kg D) 0.200 kg. E) 5.21 kg. row a baseball straight up. Compare the sign of the work done by gravity while the bak up with the sign of the work done by gravity while it goes down. A) The work is positive on the way up and positive on the way down. B) The work is positive on the way up and negative on the way down. C) The work is negative on the way up and positive on the way down. D) The work is negative on the way up and on the way down because gravity is always downward. 28. Which one has larger kinetic energy: a 500 kg object moving at 40 m/s or a 100 20 m/s? A) The 500-kg object B) The 1000-kg object C) Both have the same kinetic ene second stone with four times the mass of the fiest potential energy of the second stone compared to one is held at the same height. The gravitational that of the first stone is 29. A stone is held at a height b above the ground. A A) one-fourth as much. B) one-half as much C) twice as much. D) four times E) the same. as much

Answer 1

25. We know that mass will remain same on both the places so.

W=mg

99=1.62m

m=61.11Kg

So on earth it will weigh,

W=61.11*9.81

=599.5 or 600N

26. We know that

F=ma

So,

125=24m

m=5.2Kg