Mid Ternm PHYS 203 Fall 2017 Name I The CGS unit of Force is

Mid Ternm PHYS 203- Fall 2017 Name I. The CGS unit of Force is 1 Newton (b) Dyne (c) Pascal (d) Volts 2. Which one refers to how close a measurement is to the true or accepted value? (a) accuracy (b) precision (e) true value (d) none 3. If an object moves through equal distances in equal times, then it is moving at a constant (a) Displacement (b) Speed (c) Velocity (d) Acceleration 4. Why do you lean towards the left when a car turns right? Because of (e) Buoyancy (a) Inertia (b) Gravity (d) Velocity 5. Force acting on a bouncing ball is: (a) Gravity (b) Weight of ball (c) Friction (d) both a and b 6. How many significant figures are in 120.00 (a) 6 (b) 5 (c)3 (d)4 7. For every-.. there is an 8. Interaction between electron and proton is an example of (a) Field force (b) Contact Force (c) Inertia (d) Momentum 9. A force of 150 N is applied to a block of mass 6 kg. What is the acceleration ? (a) 25 m/s (b) 900 m/s (e) 30 m/s (d) 28 m/\'s friction is less that friction. 10. Coefficient of (b) static, kinetic (c) normal, static (d) normal, dynamic (a) kinetic, static

Solution

1.
the CGS unit of force is dyne which is defined as 1 g.cm/s^2

2.
Accuracy.
Accuracy refers to how close a measurement is to the true value of what is being measured

3.
d = s*t
d/t = s
So if d=t, then s = constant
So, speed

4.
Inertia

5. Gravity & weight
So, both a and b

6.
120.00 has five significant digits

7.
For every action, there is an equal and opposite reaction

8.
Contact force

9.F = ma
So,
a = F/m = 150/6
= 25 m/s^2

10.
coefficient of dynamic friction is less than static friction
So,a.