ACSI 2019 Y3 IP Physics Paper1

1 END-OF-YEAR EXAMINATION 2019 YEAR 3 INTEGRATED PROGRAMME PHYSICS PAPER 1 Monday 7 October 2019 1 hour INSTRUCTIONS TO STUDENTS Write and shade your index number in the box provided on the OTAS sheet. Do not open this booklet until you are told to do so. INFORMATION FOR STUDENTS There are forty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice using 2B soft pencil to shade in the OTAS sheet provided. Calculators are allowed for this paper. Take g = 10 N/kg. There are 18 printed pages.

2 Multiple Choice Questions [40 Marks] Shade your answers in the OTAS sheet provided. 1 A pair of vernier calipers is used to measure the thickness of 100 sheets of paper. The zero error and the measured thickness of the 100 sheets (in centimetres) are as shown in Fig. 1.1 and Fig. 1.2 respectively. Fig. 1.1 Fig. 1.2 What is the actual thickness of 1 sheet of the paper? A 1.02 x 10-2 cm B 1.03 x 10-2 cm C 1.04 x 10-2 cm D 1.02 x 100 cm 2 Which of the following consists entirely of scalar quantities? A power, energy and time B weight, length and speed C acceleration, force and velocity D speed, displacement and mass

3 3 The figure below shows a stroboscopic (an instrument similar to ticker tape) photograph of a ball rolling down a slope. The stroboscope is flashing at a period of 0.10 s. What is the acceleration of the ball? A 30 cm s-2 B 80 cm s-2 C 200 cm s-2 D 300 cm s-2 4 A car undergoes uniform deceleration along a straight road. It travels a distance of 100 m when it slows down from 35 m s -1 to 15 m s -1. How much longer will the car travel to come to a stop? A 3.0 s B 4.0 s C 5.7 s D 7.0 s

4 5 An E-scooter accelerates from rest for 3.0 s and then maintains a constant speed till it reaches its destination at t = 10.0 s. Which diagram shows the correct motion? A B C D 6 A hammer and feather are both released from rest at the same height and at the same time. Assuming air resistance is negligible, which statement below is true? A The gravitational forces acting on them are equal. B They have the same gravitational potential energy at the point of release. C They reach the ground with the same speed. D The acceleration of the hammer is higher than that of the feather. displacement / m time / s displacement / m displacement / m displacement / m time / s time / s time / s 0 3.0 10.0 0 3.0 10.0 0 3.0 10.0 0 3.0 10.0

5 7 A stone is thrown vertically upwards from the top of a cliff with an initial velocity of 5.0 m s-1. It reaches the bottom of the cliff at t = 4.0 s with a velocity of – 15 m s-1. How high is the cliff? A 2.5 m B 20 m C 25 m D 40 m 8 A rocket in space accelerates from rest for a period of time and then shuts down its engine. Which statement below describes the motion of rocket after shutting down its engine? A The rocket comes to a rest immediately. B The rocket decelerates to a rest. C The rocket continues to move with uniform velocity. D The rocket continues to accelerate. v / m s-1 t / s 5.0 -15 1.0 2.0 3.0 4.0

6 9 The figure below shows two trolley, X and Y, held stationary and connected to each other by a stretched elastic cord. The mass of Y is half the mass of X. The two trolleys are then stretched apart with a small displacement. When the trolleys are released at the same instant, the initial acceleration of X is 2.0 m s-2 to the right. What is the initial acceleration of Y towards the left? A 0.67 m s-2 B 1.0 m s-2 C 2.0 m s-2 D 4.0 m s-2 10 Two blocks of mass 3.0 kg and 5.0 kg are connected by two light strings and are pulled by a 10 N as shown in the figure below. Find the tension T1 and T2 in the strings. T1 T2 A 40 N 60 N B 60 N 40 N C 60 N 90 N D 90 N 60 N Trolley X Trolley Y Stretched Elastic Cord T1 T2 10 N 3.0 kg 5.0 kg

7 11 A constant force of 20 N is used to pull a 4.0 kg block along a straight horizontal track. The block moves with an acceleration of 3.0 m s -2. What is the friction acting on the block? A 8.0 N B 12 N C 20 N D 40 N 12 A 2.0 kg block of copper is brought from Earth to Planet X. Given that the gravitational field strength of Earth and Planet X are 10.0 N kg-1 and 3.0 N kg-1 respectively, how will the properties of the copper block change? Inertia Weight Density A Decreases Decreases Decreases B Decreases Decreases Remains Unchanged C Remains Unchanged Decreases Decreases D Remains Unchanged Decreases Remains Unchanged 13 Fig. 13.1 shows object A with 2.0 cm3 hole drilled into it. Object A has a mass of 100 g and volume of 130 cm 3 after the hole is drilled. The hole is then filled with another material of density 3.0 g cm-3, as shown in Fig. 13.2. Fig. 13.1 Fig. 13.2 What is the density of the composite object in Fig. 13.2? A 0.80 g cm-3 B 0.82 g cm-3 C 1.88 g cm-3 D 3.77 g cm-3 Object A Hole Object A Hole

8 14 The figure below shows a vertical force, F, being applied to raise a wheelbarrow which has a total weight of 500 N. What is the force F required to raise the legs of the wheelbarrow of the ground? A 180 N B 220 N C 280 N D 700 N 15 An empty egg- shell contains solidified wax as shown below. At which position is the egg- shell most stable when placed on a flat, horizontal surface? A B C D 1.60 m 0.70 m 0.40 m 500 N wax hollow region F

9 16 Which of the following describes the stability of an upright whiteboard marker on a table and a pendulum at rest? Whiteboard marker Pendulum A Stable Neutral B Neutral Stable C Unstable Unstable D Unstable Stable 17 Which of the two fishing rods, a long one or a short one, allows one to pull in a fish with minimum effort and why? Assume that the rods have identical masses and that the distance between the left and right hand is always constant. A The long rod, because the perpendicular distance between the line of action of the force exerted by the hand and the pivot is larger. B The long rod, because the force can be exerted nearer to the fish. C The short rod, because the perpendicular distance between the line of action of the force exerted by the fish and the pivot is smaller. D The short rod, because the perpendicular distance between the line of action of the force exerted by the hand the pivot is smaller. rod fish pivoting hand hand applying a pulling force

10 18 A 300 g bob is tied to a 0.400 m long string. It is twirled in a horizontal circle as shown. The only horizontal force acting on the stone is the 100 N tension by the string. Assuming there is negligible air resistance, find the work done by this tension. A 0 J B 0.12 J C 0.40 J D 1.2 J 19 A box of mass 5.0 kg is lifted diagonally from point A to point B as shown. What is the gravitational potential energy gained by the box? A 250 J B 600 J C 650 J D 850 J direction of motion of stone 100 N 0.400 m A 12.0 m B 13.0 m 5.0 m