Post utme physics question

                 
                                          PHYSICS

TIME: 5 MIN


1. A force (15i – 16j + 27k) N is added to a force (23j –40k)N. What is the magnitude of the resultant?
A. 17N B. 28N C. 63N D. 21N

2. Which of the following statements is/are correct about an object in equilibrium under parallel forces?
I. The total force in one direction equals the total force in the opposite direction.
II. The body must not rotate.
III The resolved components along the x-axis equals the resolved components along the y-axis.
. A. I and II only B.. I, II and III
B. II and III only C. I and III only.

3. A car moving with a speed of 90 km/h was brought to rest in 10 s by the application of the brakes. How far did the car travel after the brakes were applied
A. 150 m B. 15 m C. 250 m D. 125 m

4. A meter rule is found to balance at the 48 cm mark. When a body of mass 60 g is suspended at the 6 cm mark, the balance point is found to be at the 30 cm
mark. Find the mass of the meter rule.
A. 60 g B. 360 g C. 80 g D. 180 g.

5. A ball of mass 0.1 kg moving with a horizontal velocity of 15 m/s is shot into a wooden block of mass 0.4 kg lying at rest on a smooth horizontal surface. Find their common velocity after impact.
A 15.0 m/s B. 3.8 m/s C. 7.5 m/s
D. 3.0 m/s

6. A body of mass 2 kg moves velocity of 10 m/s. Neglecting air resistance, determine the kinetic energy of the body.
A. 200 N B. 200 J C. 100 J D. 100 N

7. Three forces of magnitude 15 N, 10 N and 5 N act on a particle in the direction which make 120o with one another. Find the resultant and the angle the resultant makes with the x-axis.
A. 8.66 N, 30o B. 4.33 N, 60o
C. 7.4 N, 45o D. 2.52 N, 60o

8. Which of the following statements best defines a couple?
A. Two parallel and opposite forces acting on one another.
B. Two equal forces acting in the same direction.
C. Two parallel and opposite forces acting on a body whose lines of action do not coincide
D. None of the above.
9. A force F = (5i + 3j)N acts on a body and causes a displacement r = (7i – j)m. Determine the work done.
A. 53 J B. 32 J C. 35 J C. 21 J.
10. A force of 0.6 N acts on a body of mass 40 g, initially at rest. What is the resulting acceleration?
A. 35 m/s2 B. 40 m/s2 C. 15 m/s2
D. 25 m/s2












ANSWERS

1. D
2. A
3. D
4. C
5. D
6. C
7. A
8. C
9. B
10. C