41. An astronaut travels to the International Space Station. Which row describes how his mass and his weight compare with their sizes on Earth? A different different B different the same C the same different D the same the same 42. The work done by a force on a body is calculated by multiplying the force by a quantity. Which quantity? A. the distance travelled in the direction of the force B. the distance travelled perpendicular to the direction of the force C. the speed in the direction perpendicular to the force D. the velocity in the direction of the force 43. A small motor has an input power rating of 10 W and is run for 5.0 minutes. What is the electrical energy input to the motor in this time? A. 2.0 J B. 50 J C. 300 J D. 3000 J 44. Two cylindrical vessels are joined together and filled with water as shown. How does the pressure at point X compare to the pressure at points Y and Z? compared to Y compared to Z A pressure at X is higher pressure at X is lower B pressure at X is higher pressure at X is the same C pressure at X is the same pressure at X is lower D pressure at X is the same pressure at X is the same 45. The pressure of a gas in a cylinder is measured using a water manometer. The density of water is 1000 kg / m3 and the gravitational field strength g is 10 N / kg. What is the pressure, above atmospheric pressure, of the gas in the cylinder? A. 200 Pa B. 2000 Pa C. 20 000 Pa D. 200 000 Pa 46. A fixed mass of gas is enclosed in a cylinder with a movable piston. The gas is initially at pressure p1 and has a volume V1. The temperature is kept constant. The piston is moved so that the pressure becomes p2 and the volume becomes V2. Which equation is correct? 47. A substance consists of particles that are close together and moving past each other at random. The average speed of the particles is gradually increasing. What best describes the substance? A. a gas being heated B. a liquid being heated C. a liquid undergoing solidification D. a solid being heated 48. A 300 N force is applied to a box to move it up a ramp, as shown. How much work is done by the force when moving the box from X to Y? A. 900 J B. 1200 J C. 1500 J D. 3000 J 49. Four beakers contain the same liquid. At which point is the pressure the greatest? Ans: C 50. A block of weight W rests on a side of area A. The gravitational field strength is g. What is the pressure exerted on the ground due to the block? A. WA B. W/A C. WA/g D. W/g 51. Water of depth 10 m exerts a pressure equal to atmospheric pressure. An air bubble rises to the surface of a lake which is 20 m deep. When the bubble reaches the surface, its volume is 6.0 cm3. What is the volume of the air bubble at the bottom of the lake? A. 2.0 cm3 B. 3.0 cm3 formuls: v proportional to d C. 12 cm3 D. 18 cm3 52. In which situation is there no transfer of energy? A. a car battery turning the starter motor B. a car moving along a horizontal road at constant speed C. a solar panel warming water D. a spacecraft orbiting the earth at constant height 53. Which row explains why a liquid has a fixed volume but does not have a fixed shape? force between molecules in the movement of molecules in the liquid liquid A large free to move within the liquid B large vibrate at fixed positions C small free to move within the liquid D small vibrate at fixed positions 54. A parachutist of mass 60 kg falls at a steady speed of 10 m / s. The gravitational field strength g is 9.8 N / kg. What is the upward force acting on the parachutist? A. 0 B. 6.0 N C. 60 N D. 588 N 55. An object is lifted. Which expression gives the increase in gravitational potential energy of the object? A. mass multiplied by its velocity B. mass multiplied by its acceleration C. the rate at which work is done D. weight multiplied by the increase in height 56. The diagram shows a stationary fairground ride with four chairs of equal mass. Which chair has the most gravitational potential energy? 57. The diagram shows a rectangular block. The density of the block is 2.5 g / cm3. What is the mass of the block? A. 18 g B. 24 g C. 50 g D. 150 g 58. Two glass containers filled with different liquids are placed next to each other. Point P is a distance h below the surface of the liquid in one container. Point Q is a distance h below the surface of the liquid in the other container. Why is the pressure at P different from the pressure at Q? A. The atmospheric pressure is different at P. B. The densities of the liquids are different. C. The gravitational field strength is different at P. D. The shapes of the containers are different.
