Test - Unit 6 Force Flashcards
- When two forces on the Same object are equal and opposite, these forces are called — forces.
Balanced
Unit 6 concept 1,2 pg 1
- What is acceleration of the box in the picture to the right?
245 N
Unit 6 Concept 1,2 pg 3
- What is the weight of the box in the picture to the right?
12 m/s2
Unit 6 Concept 1,2 pg 4
- Compared to the inertia of a 2.0 kg ball, the inertia of a 4.0 kg ball is?
Twice as great
Unit 6 concept 1,2 pg 1
- Consider a watermelon that starts from rest and is dropped straight down from a tall building. Air resistance can be ignored. Which statement about the watermelon’s motion is false?
The watermelon falls with a constant velocity.
Unit 6 Concept 1,2 pg 3
- A man weighing 800 N is standing on a chair. In order to support the man, what force is the chair exerting?
800 N
Unit 6 Concept 1,2 pg 1
- What is the net force on the block to the right?
2 N left
Unit 6 Concept 1,2 pg 1
- If the block in the picture above has an acceleration of 1 m/s2, what would be the blocks mass?
2 kg
Unit 6 Concept 1,2 pg 3
- An object that is falling freely has a constant what?
Acceleration
Unit 6 Concept 1,2 pg 4
- A student drops a feather and rock at the same time from mrs. Taylor’s window. If air resistance wasn’t a factor, what should she observe?
The rock and feather fall at the same rate
Unit 6 Concept 1,2 pg 1
- If the same force is applied to each of the balls pictured below, wick one will have the least acceleration?
M = 7.3 kg
Unit 6 Concept 1,2 pg 3
- An object in motion with no unbalanced forces acting on it will?
Continue to move in its path at a constant speed
Unit 6 Concept 1,2 pg 1
- The relationship among mass, force, and acceleration is explained by?
Newton’s 2nd law of motion
Unit 6 Concept 1,2 pg 3
- For any object, the greater the force that’s applied to it , the greater it’s — will be?
Acceleration
Unit 6 Concept 1,2 pg 2
- Tendency of an object at resist changes in motion?
Inertia
Unit 6 Concept 1,2 pg 1
- The attraction any two have on one another
Gravity
Unit 6 Concept 1,2 pg 3
- A net force acting on an object causes the object to acceleration in the direction of the net force?
Newton’s 2nd law
Unit 6 Concept 1,2 pg 3
- Related to the amount of force needed to change an objects motion?
Momentum
Unit 6 Concept 1,2 pg 4
- Why does someone not wearing a seat belt in a car fly forward when the car stops suddenly?
Because objects in motion resist a change in motion, due to inertia. 1st law
Unit 6 Concept 1,2 pg 1
- Why does it take more effort to make a bowling ball accelerate 25 m/s2 than to make a tennis ball accelerate 25 m/s2? Make sure to include which law explains this.
Because the bowling ball has more mass thus needs a greater force to accelerate it 2nd law.
Unit 6 Concept 1,2 pg 3
