Jeopardy- Chpt 1 & 2 Review Q $1 Q $1 Q $1 Q $1 Q $1 Q $2 Q $2 Q $2 Q $2 Q $2 Q $3 Q $3 Q $3 Q $3 Q $3 Q $4 Q $4 Q $4 Q $4 Q $4 Q $5 Q $5 Q $5 Q $5 Q $5 Final Jeopardy
$1 Question from H1 An object with a Mass of 9kg has an accleration of 3 m/s2 . What is the force?
$100 Answer from H1 27 N F=MA = 9 * 3
$2 Question from H1 A 300N force acts on a 25kg object. The acceleration of the object is ______
$2 Answer from H1 12m/s2 F=ma 300= 25a
$3 Question from H1 What is the equation for accleration?
$3 Answer from H1 A = Final Velocity-Initial velocity /time
$4 Question from H1 A compact car with a mass of 725 is moving at 30m/s. What is it’s momentum?
$4 Answer from H1 21750kgm/s P=mv P= 725 * 30
$5 Question from H1 You push against a wall with a force of 5N. What is the force the wall exerts on you?
$5 Answer from H1 • 5 N. Nothing moved = balanced forces
$1 Question from H2 True of False? Momentum is always the same before and after a collision.
$1 Answer from H2 True
$2 Question from H2 What contributes to the momentum of an object?
$2 Answer from H2 Mass and velocity P= mv
$3 Question from H2 Newton’s 3rd Law describes the forces between two colliding objects. Use this connection to explain the forces acting when you kick a soccer ball.
$3 Answer from H2 When the foot connects with the ball the foot accelerated the call forward and the ball accelerates the foot backward, slowing its forward motion somewhat.
$4 Question from H2 What would you observe if you rolled one marble into the end of a line of stationary marbles (think about Newton’s cradle) Why does this happen?
$4 Answer from H2 The final marble rolls away with the same momentum the incoming marble had. Momentum was transferred from one marble to the other but was not lost.
$5 Question from H2 If a small car is stopped at a traffic light and is hit from behind by a truck, what will happen?
$5 Answer from H2 Both vehicles will move forward with the car moving faster than the truck because it has less mass.
$1 Question from H3 Newton’s first law of motion states that an object will stay in constant motion unless a(n) ___________ force acts on it.
$1 Answer from H3 Unbalanced
$2 Question from H3 A ________ or ___________ is an example of a force
$2 Answer from H3 Push or pull
$3 Question from H3 Gravity is a form of ____________ and has a value of ________.
$3 Answer from H3 Acceleration, 9.8m/s2
$4 Question from H3 I placed a cup of water on a skateboard and pushed it across the room to another person who stopped the skateboard. What would happen to the cup of water? Why?
$4 Answer from H3 The cup of water keeps moving and spills because an outside force did not act on it. The force only acted on the skateboard.
$5 Question from H3 Newton’s 3rd Law (action reaction forces between gas molecules and a rocket) causes a rocket to launch. The force on the rocket is called thrust and it is equal to the mass ejected per second times the velocity of the expelled gas. How is this equivalent to F=ma?
$5 Answer from H3 Thrust = (m/t)v = m(v/t)= ma=F
$1 Question from H4 The force of gravity between two objects depends on what two things?
$1 Answer from H4 The objects mass and the distance between them.
$2 Question from H4 • Which of the following is the friction that prevents a book from sliding on a table? • Gravity • Sliding friction • weight
$2 Answer from H4 A sliding friction
$3 Question from H4 • An object is accelerated by a net force in which direction? • At an angle to the force • In the direction of the force • in the direction opposite to the force • Any of the above are possible
$3 Answer from H4 b) In the direction of the force
$4 Question from H4 Suppose a canoe has a mass of 45kg and a person has a mass of 75kg. If the person jumps out of the back end of the canoe into the water, will the canoe of the person have a greater acceleration?
$4 Answer from H4 The canoe because the forces on the canoe and the person are the same and the canoe has less mass, it will have greater acceleration.
$5 Question from H4 A baseball is pitched east at the speed of 40km/h. The batter hits it west at a speed of 40km/h. Did the ball accelerate? Explain.
$5 Answer from H4 Yes, the ball changed directions
$1 Question from H5 eriiatn
$1 Answer from H5 inertia
$2 Question from H5 townes
$2 Answer from H5 Newton's
$3 Question from H5 Budenlaacn crofes
$3 Answer from H5 Unbalanced forces
$4 Question from H5 cceeaaltion
$4 Answer from H5 acceleration
$5 Question from H5 • Servcoantion of oemmntum