1 Which physical quantity is equal to $\dfrac{\text{displacement}}{\text{time}}$? flag bookmark A Speed B Velocity C Distance D Acceleration T4 Chapter 2.1 Linear Motion Velocity is the rate of change of displacement, displacement ÷ time. Speed is distance ÷ time.
2 The graph in Diagram 1 shows the relationship between s and t. Which equation represents the relationship between s and t? flag bookmark A s = t + 10 B s = −t + 10 C s = t − 10 D s = −t − 10 T4 Chapter 1.2 Scientific Investigation The line cuts the s-axis at 10 and the t-axis at 10, so the gradient is −10/10 = −1 and the intercept is 10: s = −t + 10.
3 Which ticker tape shows an object moving with constant deceleration? flag bookmark A B C D T4 Chapter 2.1 Linear Motion The tape moves in the direction of the arrow, so the first dot is at the right-hand (front) end. On tape A the spaces between dots get smaller steadily from right to left, so the object covers less distance in each tick: it is decelerating. B speeds up, C has equal spaces (constant velocity) and D is irregular.
4 Diagram 2 shows two identical wooden tops. One of the tops is partly coated with metal. What happens to the inertia of the metal-coated top when both tops are spun with the same velocity? flag bookmark A Increases B Decreases C Unchanged T4 Chapter 2.4 Inertia The metal coating adds mass, and inertia depends on mass, so the metal-coated top has greater inertia.
5 Diagram 3 shows a collision between a plasticine ball and a steel ball. (The lower picture shows the balls after the collision.) The situation above explains flag bookmark A the principle of conservation of energy B Newton's second law of motion C Newton's first law of motion D the principle of conservation of momentum T4 Chapter 2.5 Momentum The plasticine ball hits the steel ball and they stick together and move off as one body: an inelastic collision. The total momentum before the collision equals the total momentum after it.
6 Diagram 4 shows a man pushing a baby stroller with a force of 10 N. His daughter, of mass 10 kg, is riding in it. The mass of the stroller is 7 kg. (The road surface is smooth and there is no other resistance opposing the motion.) What is the acceleration of the baby stroller? flag bookmark A 0.59 m s⁻² B 1.00 m s⁻² C 1.43 m s⁻² D 3.33 m s⁻² T4 Chapter 2.6 Force a = F/m = 10 ÷ (10 + 7) = 0.59 m s⁻².
7 Diagram 5 shows a baseball player moving his hands backwards while catching a fast ball to reduce the pain in his hands. The situation above involves flag bookmark A Impulsive force B Momentum C Inertia D Impulse T4 Chapter 2.7 Impulse and Impulsive Force Moving the hands backwards increases the time taken to stop the ball. Since impulsive force = change in momentum ÷ time, the impulsive force on the hands is reduced.
8 The strength of the gravitational field is flag bookmark A force per unit mass B force per unit weight C force per unit volume D force per unit acceleration T4 Chapter 2.8 Weight Gravitational field strength g is the gravitational force acting per unit mass, g = F/m (unit N kg⁻¹).
9 The following is a conversation between a teacher and a student during a Physics class. Student: Why does the Moon take a shorter time to orbit the Earth than the Earth takes to orbit the Sun? Teacher: Because the radius of the Moon's orbit is smaller than the radius of the Earth's orbit. The larger the radius of an orbit, the longer the orbital period. The conversation leads to which law of physics? flag bookmark A Kepler's Third Law B Kepler's Second Law C Kepler's First Law D Newton's Law of Universal Gravitation T4 Chapter 3.2 Kepler's Laws Kepler's third law states that T² ∝ r³: the larger the orbital radius, the longer the orbital period.
10 'Moves around the Earth in the same direction as the Earth's rotation on its axis and has an orbital period of 24 hours.' The statement above refers to a flag bookmark A weather forecast satellite B non-geostationary satellite C geostationary satellite D Global Positioning System satellite T4 Chapter 3.3 Man-made Satellites A geostationary satellite orbits above the equator in the same direction as the Earth rotates, with a period of 24 hours, so it stays above the same place.