1.The gravitational field strength on the surface of the Moon is 1.6N/kg. Which values of mass and weight are correct for an object placed on the Moon’s surface?
| | Mass/kg | Weight/N |
| A | 10 | 1.6 |
| B | 10 | 16 |
| C | 16 | 10 |
| D | 16 | 160 |
Ans. B
2.Three objects are cut from the same sheet of steel. They are different shapes but they all have the same mass.
Which object has the greatest density?
A the disc
B the L-shape
C the square
D all have the same density
Ans. D
3.A quantity of gas in a sealed balloon cooled sown. No gas is allowed to enter or leave the balloon. How do the listed properties of the gas change?
| | Mass | Volume | Density |
| A | Decreases | Stays the same | Increases |
| B | Increases | Stays the same | Decreases |
| C | Stays the same | Decreases | Increases |
| D | Stays the same | Increases | Decreases |
Ans. C
4.What is mass?
A. The weight of an object
B. The amount of substance in a body
C. The volume of the substances in a body
D. The density of the substance in the body
Ans. B
5.The weight of a man on a certain planet is 50MN. His mass on the Earth is 50kg. What is the gravitational acceleration due to the planet?
A.106 m/s2
B.103 m/s2
C.10 m/s2
D. None of the above
Ans. A
6.Planet A has gravitational acceleration of 10 m/s2. Planet B has twice the gravitational acceleration of planet A. An identical steel ball is released from the same distance above the ground on both planets respectively. Which
of the following statements is true?
A. They both land on the planets at the same time because they accelerate at the same rate.
B. They both land on the planets at the same time because they both have the same mass.
C. Ball A reaches first because it accelerates faster.
D. Ball B reaches first because it accelerates faster.
Ans. D
7.The mass of a glass sphere is 900g. The radius is 5cm. calculate the density of the sphere. (Take volume of sphere = 4/3 πr3
A. 1920 kg/m3
B. 1720 kg/m3
C. 1500 kg/m3
D.600 kg/m3
Ans. B
8.Compression balance may be used anywhere in the Universe to accurately measure __________.
A. mass
B. weight
C. density
D. kinetic energy
Ans. B
9.What will happen to the density and weight of an object that is launched from the Earth into the Space?
A.It’s the density stays constant while its weight decreases.
B.Its weight stays constant while its density decreases.
C.Both its density and weight remain constant.
D.Both its density and weight decrease.
Ans. A
10.The weight of a man on the Moon is 96N. Given that the gravitational acceleration of the man on the Earth and the Moon are 10 m/s2 and 1.6 m/s2 respectively, what is his weight on the Earth?
A. 60 N
B.96 N
C. 600 N
D. 960 N
Ans. C
Qian Wei's & Xiao Jun's physics blog ^^.