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QUESTION 2 The definition of average speed is the rate of change of (A) velocity. (B) distance. (C) acceleration. (D) displacement.
QUESTION 6 (4 marks) The diagram shows a particle Q entering a uniform magnetic field of 0.090 T. The particle has a speed of 1.5 x 10°m s!. Once in the magnetic field the particle moves in a circular path as shown. O e __________________ B=0.090T It is suspected that Q 1s one of the particles listed in the table. Particle number | Charge g (C) Mass m (kg) Determine which particle Q is most likely to be.
QUESTION 11 Uniform circular motion occurs when an object is travelling in a circle at a constant (A) speed due to a force of constant magnitude acting in a parallel direction to its velocity. (B) wvelocity due to a force of constant magnitude acting in a parallel direction to its speed. (C) speed due to a force of constant magnitude acting in a perpendicular direction to its velocity. (D) wvelocity due to a force of constant magnitude acting in a perpendicular direction to its speed.
QUESTION 22 (3 marks) A planet is orbiting a 3.38 x 10! kg star. The radius of the orbit is 4.23 x 10% km. Calculate the average speed of the planet. Average speed = ms ' (to the nearest whole number)
QUESTION 25 (4 marks) The graph shows the centripetal forces required to keep objects with different mass in uniform circular motion with a constant speed and constant radius of 20 cm. 7 Centripetal force (N) 0 0.05 0.10 0.15 0.20 0.25 Object mass (kg) Determine the speed of the objects.
QUESTION 3 (3 marks) An object undergoes uniform circular motion in a path with a radius of 7. Determine the effect on the radius if the mass of the object is doubled but the centripetal force and velocity remain unchanged.
QUESTION 12 An object experiencing uniform circular motion in a horizontal plane travels at an average speed of 8.0 m s Calculate the radius of the objects path if it takes 0.3 s to complete a full rotation. (A) 3.8x10'm (B) 2.6x10°m (C) 1.5x10'm (D) 1.7x10*m
QUESTION 28 (7 marks) An object of mass 200 g moves in a uniform circular path with a radius of 25 cm. The time taken for 10 revolutions 1s 3.0 s. a) Calculate the distance travelled by the object after 3.9 s. Show your working. [2 marks] Distance = m (to two significant figures) b) Calculate the centripetal force acting on the object. Show your working. [5 marks] Centripetal force = N (to two significant figures)
QUESTION 6 Select the words that correctly complete the description of uniform circular motion. The motion of an object travelling at a in a circle due to a force acting on the object in a direction to the velocity of the object. (A) varied speed parallel (B) varied acceleration parallel (C) constant speed perpendicular (D) constant velocity perpendicular
QUESTION 13 Calculate the resulting radius of circular motion when a 150 g mass travelling at 3.0 m s experiences a centripetal force of 15 N. (A) 3.0cm (B) 90cm (C©) 1lcm (D) 20cm
QUESTION 23 (3 marks) A 5 kg object 1s experiencing a centripetal force of 80 N and is moving in uniform circular motion with a speed of 8 m s'. Calculate the radius of the circular path. Show your working. Radius = m (to the nearest whole number)
QUESTION 25 (4 marks) The diagram below shows a moving charged particle in a magnetic field. X X X X X X X X B=0.02T X X X X X Calculate the mass of the charged particle using the information provided in the diagram above. Show your working. Express the solution using scientific notation. Mass = kg (to 1 decimal place)
QUESTION 6 An object of mass 6.0.x 107 kg travels along a path as shown. The object takes 25 seconds to complete the semicircular section of the path. Yoo _ # aN 7 \ / \ 7 \ < ra 160m | / } Yo / 7 / s fo Z 7 Va Not to scale a Calculate the centripetal force experienced by the object as it moves from Y to Z. (A) 3.0x10°N (B) 7.6x107N (C) 3.8x10°N (D) 7.6x10'N
QUESTION 22 (3 marks) Particles move at a rate of 1.3x10° times per second around a circular particle accelerator with a radius of 35 m. Calculate the average speed of the particles. Show your working. Average speed = ms! (to two significant figures)
QUESTION 27 (5 marks) A satellite orbits a planet of mass 6.42 x 107° kg at a height of 5000 km from the surface. The planet has a diameter of 6780 km. Determine the speed required for the satellite to maintain its orbit. Show your working. Speed = ms! (to two significant figures)
QUESTION 2 (5 marks) In a frictionless system object A rests on an inclined plane and object B undergoes horizontal circular motion. The two objects are connected by a length of string as shown. Not to scale Determine the speed of object B needed for object A to remain stationary. Show your working. ms! (to two significant figures)
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