E&M interactions
It is the phenomenon for which generators, transformers and electric motors work.
Electromagnetic Induction
The international unit to measure forces
a) Meter b) Kilogram c) Newton d) Volt
c) Newton
Re-order and Relate the right measurement unit with its correct magnitude:
Speed | m/s2
Acceleration | m
Time | km/h
Distance | min
Speed | km/h
Acceleration | m/s2
Time | min
Distance | m
An toy car is moving and then is suddenly stopped by a barrier. Which of the Newton's Laws explains the car being stopped?
First Newton Law
It is the constant value of Earth's gravitational acceleration (g).
9.8m/s2
It is the kind of electric current produced by batteries or friction.
a) Alternate Current b) Direct Current
b) Direct Current
Is an object's natural resistance to stay at rest or to keep moving
Inertia
It is defined as the change of position through time, considering a given direction
a) Speed b) Velocity c) Acceleration
b) Velocity
Which of the following is related with Newton's third law of motion?
a) If you double the acceleration, you double the force
b) If you hit something, an equal force will hit you back
c) If you are static, you will remain static until you start walking
b) If you hit something, an equal force will hit you back
It is the friction produced by a gas or a liquid on an object
a) Static Friction
b) Fluid Friction
c) Rolling Friction
d) Sliding Fricition
b) Fluid Friction
A transformer is a device that:
a) Turns voltage
b) Generates voltage
c) Eliminates voltage
d) Creates voltage
a) Turns voltage
Classify the following as "Contact" or "Non Contact" Forces.
a) Magnetism
b) Electrical Force
c) Friction
d) Inertia
e) Gravity
a,b and e: Non Contact
c,d: Contact
It is defined as the change of speed through time
a) Speed b) Velocity c) Acceleration
c) Acceleration
If you pick the heavier hammer you hit a nail with a greater force. Which Newton's law explains this?
Newton's Second Law
What kind of friction a car experiments when it breaks?
First sliding then static
An Alternating Current of 15,000 V gets turned into 150 V. What kind of transformer is this?
Step-Down
A football player pushes against its rivals. Player A pushes with a 30 N force while player B and C push back together with 10 and 20 N respectively. What is the Net Force? To which direction are the players moving?
0 N, No motion since are balanced forces
A car travels 30 km at 30 min. What is the car's speed?
a) 30 km/h
b) 60 km/h
c) 20 km/h
d) 40 km/h
b) 60 km/h
An 70 kg football player kicks a ball so it accelerates up to 4 m/s2 . What is the force of the impact?
280 N
Calculate the mass of an object that has 900 N Weight (W)
91.8 kg
A transformer turns a Primary voltage from 200 V to 2000 V. The primary coil has 3 loops. How many loops are on the secondary coil?
30 loops
Select the Balanced force from the following
a) 20 N ----> <------ 10 N
b) 30 N -----> ------> 30 N
c) 20 N ------> <------ 20 N
d) 10 N <-------- 10 N<---------
c) 20 N ------> <------ 20 N
A person jogs around a 3 km track. The first 0.5 km take 3 min. The next 1.5 km take 9 min and the final 1.0 km take 6 min. Is the person accelerating? Explain
No, because speed is constant at 0.16 km/min or 9.6 km/h
A martial artist kicks a dummy at 3.0 m/s2 acceleration. The force of the kick was determined to be 120 N. How much the martial artist weights (mass)?
40 kg
What is the weight of a Car on the moon if is 1800 lb on Earth? Consider the moon being 1/6 of Earth's gravity.
300 lb