Midterm Review Mr. Hauser

Rules of the Game Working in TEAMS, you will be asked to answer questions from the assigned chapters. You have 30 seconds to write the answer down on the dry erase board. When the teacher says TIME’S UP, a team leader will stand up and show the teacher their answer.

Rules (Continued) Each correct answer is worth one point, unless otherwise stated. Teams can lose points for inappropriate conduct, comments, or cheating. The team with the most points at the end of the game wins!

Question 1 What is the area of physics that studies motion and its causes?

ANSWER Mechanics

Question 2 Who is credited with defining the scientific method?

ANSWER Galileo

Name the three base quantities we will measure in physics. Question 3 Name the three base quantities we will measure in physics.

ANSWER Mass, Length, Time

What are the base metric units for mass in physics? Question 4 What are the base metric units for mass in physics?

ANSWER Kilograms

Question 5 How many kg are in 12,700 grams?

ANSWER 12.7 kg

Question 6 How many nm are in 0.0015 cm?

ANSWER 15,000 nm

True or False: Weight and mass both mean the same thing. Question 7 True or False: Weight and mass both mean the same thing.

ANSWER False

Question 8 The acceleration due to gravity on Earth is what value? (include units)

ANSWER -9.8 m/s2

Question 9 One second after starting from rest, a freely falling object will have a speed of about…

ANSWER 10m/s (9.8m/s)

Question 10 What are the metric units used to measure acceleration?

ANSWER m/s2

Velocity is a vector quantity because it has both … Question 11 Velocity is a vector quantity because it has both … action and reaction counterparts. magnitude and direction. mass and acceleration.

B. Magnitude (size) and direction. ANSWER B. Magnitude (size) and direction.

Question 12 A feather and a penny are both dropped from rest from the same height inside a vacuum tube. The feather lands… before the penny. after the penny. at the same time as the penny.

C. at the same time as the penny ANSWER C. at the same time as the penny

Question 13 What is it called when a falling object no longer accelerates because of the air resistance force?

ANSWER Terminal velocity

Question 14 Velocity can be found by calculating the slope of a _________ vs. time graph.

position or displacement ANSWER position or displacement

Question 15 If acceleration is positive and an object’s initial velocity is negative, it is… speeding up. slowing down. at rest.

ANSWER B) Slowing down

Question 16 The average speed of a car in meters per second that goes 40 km in 20 minutes is …

ANSWER 33 m/s

Question 17 Find the acceleration of a boat that slows from 15 m/s to 3.2 m/s in a time of 3 minutes

ANSWER -0.066m/s2

Question 18 How long must a motorcycle jump be (length) in order to allow the driver to start from rest and attain a velocity of 41 m/s with an acceleration of 6.4 m/s2?

ANSWER 131.3 meters

Question 19 The acceleration of a projectile at the very top of its flight is…

ANSWER -9.8 m/s2

Question 20 Find the vertical and horizontal components of an initial velocity of 45 m/s at an angle of 25 degrees above the horizontal. You must label which is which.

ANSWER Vx = 40.8 m/s Viy = 19.1 m/s

Question 21 A bullet is fired horizontally from a certain height at the same time a bullet is dropped from that same height. Which bullet lands first, the fired bullet, the dropped bullet, or do they hit at the same time?

They hit at the same time ANSWER They hit at the same time

Question 22 All projectiles trace a trajectory in the shape of a…

ANSWER Parabola

Question 23 For every action, there is an equal and opposite reaction is a statement of _______________.

ANSWER Newton’s Third Law

Question 24 An object’s resistance to a change in its state of motion is called _________.

ANSWER Inertia

The mass of a pet turtle that weighs 10N is about Question 25 The mass of a pet turtle that weighs 10N is about 1kg 100kg 1000 kg 10 kg none of these

ANSWER A. 1kg

Question 26 The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is … Less than 10 N. More than 10 N. 10 N

ANSWER C. 10 Newtons

Question 27 What is the only quantity that affects the amount of inertia something has?

ANSWER mass

Newton’s Second Law states Question 28 Newton’s Second Law states a= ∑F-M a= ∑F/m m= ∑F a ∑F=m/a

ANSWER B. a = ∑F/m

Question 29 A jet has a mass of 100,000kg. Each of its two engines has a force of 50,000N. What is the jet’s acceleration in meters per second squared? 1 2 4 .25 None of these

ANSWER 1 m/s2

What type of friction is always the largest? Question 30 What type of friction is always the largest?

ANSWER Static

Question 31 A 250 kg motorcycle accelerates from rest to 22 m/s in a time of 3.1 seconds. Find the size of the net force that caused it to do this.

ANSWER 1,774 N

Question 32 A 0.4kg hockey puck slides on a perfectly frictionless surface. The force required to keep it moving is… 4 Newtons 0.4 Newtons 40 Newtons 0 Newtons

ANSWER 0 Newtons (an object in motion will stay in motion)

Question 33 A force applied over a distance is called ____________.

ANSWER Work

Question 34 Energy of motion is called Potential Work Kinetic Chemical

ANSWER Kinetic

Question 35 What are the metric units used to measure power? (Write out the word)

ANSWER Watts

Power is ________ related to time. Question 36 Power is ________ related to time. A) directly B) inversely C) quadratically D) linearly

ANSWER B) inversely

Question 37 _________ is defined as the ability to cause change or the ability to do work.

ANSWER Energy

If an object doubles its speed its kinetic energy will... Question 38 If an object doubles its speed its kinetic energy will... be halved. double. quadruple. be reduced to one fourth.

ANSWER C) quadruple

Question 39 How much work is done to lift a 45 kg weight up a distance of 6.2 meters at a constant velocity?

ANSWER 2,734 Joules

Question 40 Energy can neither be created nor destroyed but it can be converted from one form to another. This statement is called ______.

Law of Conservation of Energy ANSWER Law of Conservation of Energy

FINAL QUESTION A ball rolls off a table that is 0.87 meters high with a speed of 10m/s in the horizontal direction. How far away from the base of the table does it land?

ANSWER 4.2 meters