stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Newtons laws of motion Flashcards | StudBud
Explore
/
Newtons laws of motion
Newtons laws of motion
18 terms
·
StudBud Administration
·
185 plays
Newtons laws of motion #ks5 #alevel #physics #newton
Flashcards
18 cards
F
Practice quiz
P
Host live
L
Questions
18
Answers
1
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.
Objects travel at constant velocity unless a force acts.
2
Newtons third law states
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.
A bodies motion remains unless acted on by a net force
3
For the collision shown, which quantities are conserved?
Momentum only
Momentum and kinetic energy
Kinetic energy only
Neither momentum nor kinetic energy
4
What is meant by the weight of an object?
the object’s mass multiplied by its acceleration
the gravitational force acting on the object
the mass of the object multiplied by g
the gravitational field acting on the object
5
A mass accelerates uniformly when the resultant force acting on it
is constant but not zero.
is proportional to the displacement from a fixed point.
is zero.
increases uniformly with respect to time.
6
Which diagram shows the forces producing the greatest magnitude of acceleration of the block?
2
1
3
4
7
A 75kg skater @ speed of 6 m/s. What average force required to stop the player in 0.65 s?
120 N
290 N
920 N
690 N
8
A force acts on a moving ball, how many of these changes could happen?
1
4
3
2
9
A boy in an elevator that is accelerating down. The force that the boy exerts on the floor
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
less than the weight of the boy when at rest
10
Which body is in equilibrium?
an apple falling freely
a block sliding at constant velocity across a tabletop
a cart rolling down a frictionless incline
a satellite moving around Earth
11
Block A and B, at rest on a horizontal,frictionless surface. The acceleration of block B is
3.0 m/s2
6.0 m/s2
2.0 m/s2
4.0 m/s2
12
A boy pulls a 60N sled with a force of 20N What is the force that the sled exerts on the boy?
40. N
20. N
60. N
80. N
13
Newtons second law states
Force is proportional to acceleration if mass is constant
A bodies motion remains unless acted on by a net force
If A exerts a force on B then B in turn exerts a force on A.
14
A ball of weight
W
slides along a horizontal surface until it falls off the edge at time
T
B
D
A
C
15
A ball falls from rest and eventually reaches a terminal velocity. What are forces X and Y ?
X = air resistance Y = resultant force
X = upthrust Y = weight
X = air resistance Y = weight
X = upthrust Y = resultant force
16
If you have a hockey puck sliding along a table, it will eventually come to a stop. Which law?
Newton's second Law
Newton's third Law
Newton's First Law
All
17
A girl weighing 100 N is on scales in a lift, they read 110 N, what's the motion of the lift?
Moving upwards with a constant velocity.
Moving downwards with a constant velocity.
Moving downwards and decelerating.
Moving upwards and decelerating.
18
Crumple zones work because
increasing Δt decreases F
decreasing Δt increases F
increasing Δt increases F
decreasing Δt decreases F
