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MIXED BAG
Newtons Law's
Speed/Acceleration
FORCE
MOMENTUM
100
What goes on the x -axis of a graph?
What is INDEPENDENT VARIABLE
100
Which of Newton's Law is the following?? An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
What is Newton's First Law?
100
Speed is a. measure of how fast something is moving b.the distance cover per unit time c. always measured in terms of a unit of distance divided by a unit of time d. all of the above
What is D. all of the above
100
The force required to maintain an object at a constant speed in free space is equal to a. zero b. the mass of the object c. the weight of the object
What is A Zero
100
When looking at the speedometer in a moving car, you can see the car's a. instantaneous speed b. average speed c. instantaneous acceleration
What is A instantaneous speed
200
Compared to a sports car moving at 30 miles per hour, the same sports car moving at 60 miles per hour has a. the same momentum b. twice as much momentum c. half as much momentum
What is B twice as much momentum
200
If you drop a feather and a coin at the same time in a vacuum tube (ignoring air resisitance), which will reach the bottom of the tube first ? a. the coin b. The feather c. neither - they will both reach the bottom at the same time
What is neither - they will both reach the bottom at the same time
200
Acceleration is feined as the CHANGE in a. distance divided by the time interval b. velocity divided by time interval c. time it takes to move from one speed to another speed
What is C time it takes to move from one speed to another speed
200
Ms. Bryant hit a hammer. During the Collison, there is a force a. on the hammer but not the nail b. on the nail but not the hammer c. on the nail and also on the hammer
What is C. on the nail and also on the hammer
200
A ball is thrown straight up. At the top of its path its instantaneous speed is a. 0 m/s b. about 5 m/s c. about 10 m/s
What is A 0 m/s
300
A collison is considered elastic if a. there is no lasting deformation b. the objects do not couple together after the collison c. after the collision, the objects have the same shape as before the collision d. all of the above
What is D all of the above
300
The reason padded dashboards are used in cars is that they a. look nice and feel good b. increase force of impact in a collsion c. increrase the time of impact in a collision
What is C increrase the time of impact in a collision
300
Accelerations are producted by a. velocities b. accelerations c. forces
What is C forces
300
Forces always occur a. by themselves b. as a single quantities c. in pairs
What is C in pairs
300
The momentum change of an object is equal to the a. force acting upon it b. velocity change of the object c. impulse acting on it
What is C impulse acting on it
400
What is the difference between a scalar and vector quanity?
What is Scalar - magnitude Vector - magnitude and direction
400
In order to catch a ball, a baseball player moves his or her hand backwards in the direction of the ball's motion. Doing this reduces the force of impact on the player's hand principally because A. the velocity of the hand is reduced b. the momentum of impact is reduced c. the time of impact is increased
What is C the time of impact is increased
400
A cannon recoils from launching a cannonball. The speed ofthe cannon's recoil is small because the a. force against the cannon is realtively small b. impulse on the cannon is less than the impulse on the cannonball c. cannon has far more mass than the cannonball
What is C cannon has far more mass than the cannonball
400
The player hits a ball with a bat. The action force is the impact of the bat against the ball. What is the reaction to the force?
What is the force of the ball against the bat?
400
A 3-kg ball is thrown 6 m/s. What it the balls momentum? a. 2 kg m/s b. 18 kg m/s c. 9 kg m/s
What is B 18 kg m/s
500
What is Newton's Third Law?
What is For every action, there is an equal and opposite reaction.
500
A car has a mass of 2000 kg and acceleration at 5 m/s. What is the net force acting on the car?
What is 10,000 N
500
When an object reaches terminal velocity its acceleration is what?
What is 0 m/s?
500
a 10-N force and a 50-N force act in the same direction on an object. What is the total net force on the object?
What is 60-N force?
500
A ball is moving at 4 m/s and has a momentum of 60 kg m/s. What is the balls mass? a. 15 kg b. 240 kg c. 60 kg
What is A 15 kg