PHY101 Midterm Mega File

Phy101 Midterm Preparation file No:01 · Lecture No:01-22 · By Rj Afzal

Q1. Power is equal to the dot product of force and

1. Position vector
2. Displacement
3. Velocity
4. Acceleration

Q2. The frequency which is not audible for human ear is

1. 50000Hz
2. 500Hz
3. 5000Hz
4. 50Hz

Q3. A Wheel of radius 50cm having the angular speed of 5rad/s will have linear speed in m/s?

1. 1.5
2. 2.5
3. 3.5
4. 0.5

Q4. When breaks are applied to a fast moving car, the passenger will be throws:

1. Backward
2. Forward
3. Upward
4. downward

Q5. Stress can be measured

1. N.m
2. N/m2
3. Nm2
4. N/m

Q6. A heavy particle moving with 5m/s suffers an elastic collision with a light particle at rest. After collision,the velocity of light particle will be:

1. 10m/s
2. 2.5m/s
3. 20m/s
4. 5m/s

Q7. Acceleration in a body is always produced in the direction of:

1. Velocity
2. Weight
3. Acceleration
4. Force

Q8. The fundamental dimensions of angular momentum are:

1. ML-2T-2
2. ML2T-1
3. ML2T-2
4. MLT-1

Q9. Ali wants to lift a mass of 7.5kg with constant velocity by a rope that passes throw a frictionless pulley which is attached to the ceiling of room. Calculate the tension in rope by neglecting the mass of the rope.

1. 75N
2. 7.5kg
3. 75kg
4. 0.75N

Q10. The first condition of equilibrium implies that:

1. ∑FY=0
2. ∑FX=∑FY
3. ∑F=0
4. ∑FX=0

Q11. Final take off velocity of an airplane is 67m/s. The length of runway 2km, the constant

1. 3.24ms^-1
2. 3.24ms^-2
3. 2.24ms^-2
4. 2.24ms^-1

Q12. The ultimate strength of a sample is the stress at which the sample :

1. Remains under water
2. Breaks
3. Bends 180
4. Returns to its original shape

Q13. The area under the velocity time graph is:

1. Acceleration
2. Torque
3. Distance
4. Force

Q14. If you travelled for 25hours with an average speed 48miles/hours, the distance travelled is:

1. 19.2miles
2. 120miles
3. 300miles
4. 48miles

Q15. A fire whistle emits a tone of 170Hz,Take the speed of sound in air to be 340m/s. The wavelength of this sound is about:

1. 1.0m
2. 2.0m
3. 0.5m
4. 3.0m

Q16. Motion defines by the pair of variables:

1. Speed and passage of time
2. Speed and distance
3. Change of position and passage of time

Q17. The law of inertia was firstly formulated by:

1. Newton
2. Galileo
3. Einstein
4. Aristotle

Q18. When the velocity of an aeroplane is doubled, the momentum

1. Is conserved
2. Becomes Zero
3. Increases uniformly
4. Remains unchanged

Q19. As we move above, the body the surface of the earth the change in potential energy will be:

1. Infinity
2. Positive
3. Zero
4. Negative