SS3 Physics 1st Term

1. Fuel was consumed at a steady rate of 5.0 x 10^-2 kg per second in a rocket engine and ejected as a gas with a speed of 4 x 10³ ms^-1. Determine the thrust on the rocket. 2005, Q15

2. The amplitude of a wave is the —2005, Q29

3. Which of the following statements is not a reason for using soft iron in making the core of a transformer? It —2005, Q44

4. A body starts from rest and accelerates uniformly at 5 ms^-1 until it attains a velocity of 25 ms^-1. Calculate the time taken to attain this velocity. 2005, Q10

5. A particle accelerates uniformly from rest at 6.0 ms^-2 for 8 s and then decelerates uniformly to rest in the next 5 s. Determine the magnitude of the deceleration. 2015, Q11

6. The distance between two points in phase on a progressive wave is 5 cm. If the speed of the wave is 0.20 ms^-1, calculate its periods. 2005, Q27

7. Lenz’s law of electromagnetic induction states that —2005, Q41

8. The friction which exists between two layers of a liquid in relative motion is called —2005, Q4

9. A body of mass 25 kg, moving at 3 ms^-1 on a rough horizontal floor is brought to rest after sliding a distance of 2.50 m on the floor. Calculate the coefficient of sliding friction. [g = 10 ms^-2] 2005, Q5

10. Uranium of atomic number 92 and mass number 238 emits an alpha particle from its nucleus. The new nucleus formed has, respectively, atomic number and mass number. —2005, Q50