stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Mechanics: Newtons laws of motion Flashcards | StudBud
Explore
/
Mechanics: Newtons laws of motion
Mechanics: Newtons laws of motion
16 terms
·
StudBud Administration
·
130 plays
Mechanics Newtons laws of motion #ks5 #alevel #physics #newton
Flashcards
16 cards
F
Practice quiz
P
Host live
L
Questions
16
Answers
1
Which body is in equilibrium?
a car moving at constant speed along a straight, level road
a satellite orbiting Earth in a circular orbit
a projectile at the highest point in its trajectory
a ball falling freely toward the surface of Earth
2
A force acts on a moving ball, how many of these changes could happen?
3
1
2
4
3
Which situation describes an object that has no unbalanced force acting on it?
a laboratory cart moving down a frictionless 30.° incline
a hockey puck moving at constant velocity across ice
an apple in free fall
a satellite orbiting Earth
4
Newtons third law states
If A exerts a force on B then B in turn exerts a force on A.
A bodies motion remains unless acted on by a net force
Force is proportional to acceleration if mass is constant
5
Newtons second law states
A bodies motion remains unless acted on by a net force
Force is proportional to acceleration if mass is constant
If A exerts a force on B then B in turn exerts a force on A.
6
A constant mass accelerates at constant value. The resultant force acting on the mass
is constant but not zero
increases uniformly with respect to time
is proportional to the velocity
is proportional to the displacement from a fixed point
7
Newtons first law states
If A exerts a force on B then B in turn exerts a force on A.
Force is proportional to acceleration if mass is constant
A bodies motion remains unless acted on by a net force
8
A boy in an elevator that is accelerating down. The force that the boy exerts on the floor
less than the weight of the boy when at rest
greater than the weight of the boy when at rest
less than the force of the floor on the boy
greater than the force of the floor on the boy
9
Which diagram shows the forces producing the greatest magnitude of acceleration of the block?
4
3
1
2
10
Which statement about Newton’s laws of motion is correct?
The third law follows from the second law.
Conservation of energy is a consequence of the third law.
The first law follows from the second law.
11
What is meant by the weight of an object?
the gravitational field acting on the object
the gravitational force acting on the object
the mass of the object x gravitational field strength
the object’s mass x acceleration
12
Crumple zones work because
increasing t decreases a therefore F
decreasing t decreases a therefore F
increasing t increases a therefore decreasing F
increasing t decreases a therefore increasing F
13
A boy pulls a 60 N sled with force of 20 N What is the force that the sled exerts on the boy?
40 N
60 N
20 N
80 N
14
If you have a hockey puck sliding along a table, it will eventually come to a stop. Which law?
All
Newton's third Law
Newton's second Law
Newton's First Law
15
Which body is in equilibrium?
an apple falling freely
a block sliding at constant velocity across the floor
a satellite moving around Earth
a cart rolling down a frictionless incline
16
Which of the following statements is true for the two forces in a Newton’s third law pair?
They act in different directions on the same body
They have different magnitudes & act in different directions
They are the same type of force and act on different bodies
They have the same magnitude & are different types of force
