Extra lesson G11_EASE 1 Preparation

Extra lesson G11_EASE 1 Preparation

by Irvani Prasanti

Multiple Choice

Which statement, involving multiplies and sub-multiplies of the base unit meter, is correct ?

• $$1pm\ =\ 10^{-9\ }m$$  

• $$1nm\ =\ 10^{-6}m$$  

• $$1mm\ =\ 10^{6\ }\mu m$$  

• $$1km\ =\ 10^{6\ }mm$$  

Multiple Choice

A signal has a frequency of 2.0 MHz.

What is the period of the signal ?

• $$2\ \mu s$$  

• $$5\ \mu s$$  

• $$200\ ns$$  

• $$500\ ns$$  

Multiple Choice

What is the ratio $$\frac{10^{-3}\ THz}{10^3\ kHz}\ \ ?$$  

• $$10^{-9}$$  

• $$10^{-6}$$  

• $$10^0$$  

• $$10^3$$  

​Example of Homogeneous Equation

Multiple Choice

What is Watt in terms of SI base units ?

• $$\frac{J}{s}$$  

• $$\frac{m^2kg}{s}$$  

• $$\frac{m^2kg}{s^3}$$  

• $$\frac{Nm}{s}$$  

Multiple Choice

The drag force F acting on a moving sphere obeys an equation of the form  $$F\ =\ k.A.v^2$$  , where A represents the sphere's frontal area and v represents its speed.

What are the base units of the constant k ?

• $$\frac{kgm^5}{s^4}$$  

• $$\frac{kg}{m^2s}$$  

• $$\frac{kg}{m^3}$$  

• $$\frac{kgs^2}{m^4}$$  

Multiple Choice

What is the x component of the vector given in the diagram?

• 77N

• 92N

• 120N

• 60N

Multiple Choice

What is the y component of the vector given in the diagram?

• 77N

• 92N

• 120N

• 60N

Multiple Choice

What is the vertical component of this force?

• 400 N

• 200 N

• 20 N

• 346

Multiple Choice

If vectors X and Y are added, then the resultant would be best represented by vector _____. 

• A

• B

• C

• D

Multiple Choice

Which vectors can be added to make vector C?

• A and E

• A and H

• D and E

• D and H

Multiple Choice

It is a measure of how close measurements come to each other when they are made in the same way

• Accuracy

• Precision

• Error

• Extrapolation

Multiple Choice

How close a measurement is to the accepted value is called..

• Accuracy

• Precision

• Significant

• Estimate

Multiple Choice

This bullseye demonstrates...

• High Accuracy & High Precision

• High Accuracy & Low Precision

• Low Accuracy & High Precision

• Low Accuracy & Low Precision

Multiple Choice

Which Student is the most Precise?

• Alex

• Shandra

• Luis

Multiple Choice

• Student A

• Student B

• Student C

• Cannot be determined

Multiple Choice

Choose the percentage uncertainty for time:

t = 2.47 ± 0.03 s

• 1.0 %

• 1.2 %

• 1.4 %

• 1.6 %

Multiple Choice

The side of a cube is measured with an uncertainty of 2%. What is the uncertainty in the volume of the cube?

• 2%

• 4%

• 6%

• 8%

Multiple Choice

The length of the side of a cube is 2.0 cm ± 4 %. The mass of the cube is 24.0 g ± 8 %. What is the percentage uncertainty of the density of the cube?

• ± 2 %

• ± 8 %

• ± 12 %

• ± 20 %

​Calculate the speed for region A, B and C at the graph.

​Calculate the distance for region A, B and C at the graph.

Multiple Choice

This is a velocity-time graph. What is the object doing in segment A?

• Speeding up

• Slowing down

• Constant Velocity

• Not moving

Multiple Choice

Describe the motion of the object in the graph

• Moving with constant speed

• Speeding up

• Not moving

Multiple Choice

What is this graph showing?

• Constant Speed

• Acceleration (speeding up)

• Deceleration (slowing down)

• No motion

Multiple Choice

What is occurring on this graph?

• speeding up in the positive direction

• moving at a constant speed in the positive direction

• not moving

• moving at a constant speed in the negative direction

Multiple Choice

what is the speed of the motion from D to E 

• 20 m/s

• 40 m/s

• 0 cm/s

• 200m/s

Multiple Choice

At 60 seconds, how far had this object traveled? 

• 0 m

• 10 m

• 20 m

• 40 m

​Note :

​(1) accelerated motion --> a = +

​(2) decelerated motion --> a = -

​(3) In vertical motion,

a = g = 10N/kg

​(4) In free fall,

​V0 = 0 m/s

​(5) In Throwing up, at max height

​V = 0 m/s

Multiple Choice

Suppose a tourist threw the rock with an initial velocity of 8.0 m/s (down). Determine the velocity at 4s. The acceleration of gravity is 9.81 m/s

• 31.14

• 32.14

• 39.24

• 47.24

Multiple Choice

A lorry moves 25 m in 10 s along a straight road. If the initial velocity of the lorry is 3 m s^-1, calculate the final velocity.

• 2 ms^-1

• 6 ms^-1

• 8 ms^-1

• 12 ms^-1

Multiple Choice

A bus moving with an initial speed of 20 m s^-1 decelerates at a constant rate of 3 m s^-2. Calculate the distance travelled by the bus before it stops.

• 12.35 m

• 24.56 m

• 66.67 m

• 53.49 m

Multiple Choice

If I drop an apple from the top of building, and it takes 5s to hit the ground calculate how tall the building is in meters if the acceleration of gravity is 9.81 m.s-2? (write in 2 dp)

• 122.63 m

• 122.64 m

• 122.62 m

• 122.65 m

​Horizontal Projectile Motion

Note :

​(1) Initial condition :

​V0y = 0 m/s

​(2) V0x = Vx at any position of object.

​(3) to find time flight & height of building/else, use non uniform equation.

Multiple Choice

In a projectile motion we always have...

• 1 component (x)

• 3 components (x,y, and z)

• 2 components (x and y)

• 0 components

Multiple Choice

$$u\ =10\ ms^{-1}$$  

In projectile motion, if the value of its initial velocity is as above, what is the value of its x-component and y-component at an incline angle $$30^0$$  ?

• $$u_x=5\ ms^{-1}\ ;\ u_y=10\ ms^{-1}$$  

• $$u_x=10\ ms^{-1}\ ;\ u_y=5\ ms^{-1}$$  

• $$u_x=5\ ms^{-1}\ ;\ u_y=5\sqrt[]{3}\ ms^{-1}$$  

• $$u_x=5\sqrt[]{3}\ ms^{-1}\ ;\ u_y=5\ ms^{-1}$$  

Multiple Choice

$$u\ =10\ ms^{-1}$$  

In horizontal projectile motion, if the value of its initial velocity is as above, what is the value of its x-component and y-component?

• $$u_x=0\ ms^{-1}\ ;\ u_y=10\ ms^{-1}$$  

• $$u_x=10\ ms^{-1}\ ;\ u_y=10\ ms^{-1}$$  

• $$u_x=10\ ms^{-1}\ ;\ u_y=0\ ms^{-1}$$  

• $$u_x=0\ ms^{-1}\ ;\ u_y=0\ ms^{-1}$$  

Multiple Choice

A horizontally-launched projectile arcs out and hits the ground below. The vertical displacement and the horizontal displacement are measured. What is the best equation to use to find the time the projectile was in the air?

• $$\Delta\overrightarrow{x}=\overrightarrow{v}_x\cdot\Delta t$$

• $$\Delta\overrightarrow{y}=\overrightarrow{v}_{yi}\cdot\Delta t+\frac{1}{2}\cdot g\cdot\Delta t^2$$

• $$\overrightarrow{v}_{yf}=\overrightarrow{v}_{yi}+g\cdot\Delta t$$

• $$\Delta t=\sqrt{\frac{2\cdot\Delta\overrightarrow{y}}{g}}$$

Multiple Choice

A ball rolls off a table top and strikes the floor as shown. Given the measurements made, the time the projectile spent in the air is ---.

• 17 s

• 0.34 s

• 0.58 s

• 0.49 s

Multiple Choice

A skateboarder rolls off a bridge into the river as shown. If the skateboarder was originally moving at 7.0 m/s, how much time did the skateboarder spend in the air?

• 1.3 s

• 0.79 s

• 38.5 s

• 0.70 s

• Not enough information given.

Multiple Choice

A skateboarder rolls off a bridge into the river as shown. If the skateboarder spent 0.79 s in the air, how far above the river is the edge of the bridge?

• 5.5 m

• 0.70 m

• 1.3 m

• 3.1 m

• Not enough information given.

​THANKS