Physics 2: Newton's Laws
A lab cart is loaded with different masses and moved at various velocities. Which diagram shows the cartmass system with the greatest inertia?
1.0 m/s and 4 kg
A 1.2x10^3-kilogram automobile in motion strikes a 1.0x10^4-kilogram insect. As a result, the insect is accelerated at a rate of 1.0x10^2 meters per second^2. What is the magnitude of the force the insect exerts on the car?
1.0x10^-2 N
A 60-kilogram astronaut weighs 96 newtons on the surface of the Moon. The acceleration due to gravity on the Moon is
1.6 m/s^2
A 40.0-kilogram child exerts a 100.-newton force on a 50.0-kilogram object. The magnitude of the force that the object exerts on the child is
100N
A 400-newton girl standing on a dock exerts a force of 100 newtons on a 10000-newton sailboat as she pushes it away from the dock. How much force does the sailboat exert on the girl?
100N
The accompanying diagram shows a horizontal 8.0-newton force applied to a 4.0-kilogram block on a frictionless table.
2.0 m/s^2
On the surface of Earth, a spacecraft has a mass of 2:00x10^4 kilograms. What is the mass of the spacecraft at a distance of one Earth radius above Earth's surface?
2.00x10^4 kg
Two forces are applied to a 2.0-kilogram block on a frictionless horizontal surface, as shown in the accompanying diagram.
2.5m/s^2 to the left
A lamp placed on a table has a mass of 2 kilograms. If it has a weight of 20 newtons, what force does the table exert on the lamp?
20 N
A spring scale reads 20. newtons as it pulls a 5.0-kilogram mass across a table. What is the magnitude of the force exerted by the mass on the spring scale?
20 N
Compared to the inertia of a 1-kilogram mass, the inertia of a 4-kilogram mass is
4 times as great
Four forces are acting on an object as shown in the diagram. If the object is moving with a constant velocity, the magnitude of force F must be
40 N
A person kicks a 4.0-kilogram door with a 48-newton force causing the door to accelerate at 12 meters per second^2. What is the magnitude of the force exerted by the door on the person?
48 N
The diagram below shows a 5.00-kilogram block at rest on a horizontal, frictionless table. Which diagram best represents the force exerted on the block by the table?
49.1 N up
A force of 50 newtons causes an object to accelerate at 10 meters per second squared. What is the mass of the object?
5.0 kg
An unbalanced force of 20 newtons is applied to a 4.0-kilogram mass at rest. The acceleration of the object is closest to
5.0 m/s^2
If a 65-kilogram astronaut exerts a force with a magnitude of 50. newtons on a satellite that she is repairing, the magnitude of the force that the satellite exerts on her is
50 N
The magnitude of the force that a baseball bat exerts on a ball is 50. newtons. The magnitude of the force that the ball exerts on the bat is
50 N
A student with a weight of 500 newtons sits on a chair. The chair exerts a force on the student of
500 N
A high school physics student is sitting in a seat reading this question. The magnitude of the force with which the seat is pushing up on the student to support him is closest to
600 N
If an unbalanced force of 12 newtons acts on a 6-kilogram mass, the acceleration of the mass is
72 m/sec^2
A man weighing 800 newtons is standing on a chair. In order to support the man, the chair is exerting a force of
800 N
On the surface of planet X, the acceleration due to gravity is 16 meters per second^2. What is the weight of a 6.0-kilogram mass located on the surface of planet X?
96 N
The data table below lists the mass and speed of four different objects. Which object has the greatest inertia?
D (8.0 kg and 2.0 m/s)
How would the mass and weight of an object on the Moon compare to the mass and weight of the same object on Earth?
Mass would be the same but its weight would be less on the Moon.
Which statement explains why a book resting on a table is in equilibrium?
The weight of the book and the table's upward force on the book are equal in magnitude, but opposite in direction.
Which object has the most inertia?
a 10 kg sled at rest
Which person has the greatest inertia?
a 110-kg wrestler resting on a mat
Which object has the greatest inertia?
a 15-kg mass traveling at 5.0 m/s
Which object has the greatest inertia?
a 15-kilogram object at rest
Which object has the greatest inertia?
a 20.0-kg mass moving at 1.00 m/s
Which cart has the greatest inertia?
a 4-kilogram cart traveling at a speed of 1 m/s
In which situation is the net force on the object equal to zero?
a bicycle moving at constant speed on a straight, level road
In the diagram, box M is on a frictionless table with Forces F1 and F2 acting as shown. If the magnitude of F1 is greater than the magnitude of F2, then the box is
accelerating in the direction of F1
A student weighing 500 newtons stands on a spring scale in an elevator. If the scale reads 520 newtons, the elevator must be
accelerating upward
As shown in the diagram, an in ated balloon released from rest moves horizontally with velocity v. The velocity of the balloon is most likely caused by
action-reaction
If the sum of all the forces acting on a moving object is zero, the object will
continue moving with a constant velocity
A different force is applied to each of four di erent blocks on a frictionless, horizontal surface. In which diagram does the block have the greatest inertia 2.0 seconds after starting from rest?
d
The data table below lists the mass and speed of four different objects. Which object has the greatest inertia?
d
The diagram shown represents a force acting at point P. Which pair of concurrent forces would produce equilibrium when added to the force acting at point P?
equal and opposite
A copper coin resting on a piece of cardboard is placed on a beaker as shown in the diagram. When the cardboard is rapidly removed, the coin drops into the beaker. The two properties of the coin which best explain its fall are its weight and its
inertia
Base your answer(s) to the following question(s) on the diagram below, which shows a 1.0-newton metal disk resting on an index card that is balanced on top of a glass.
inertia
The greatest increase in the inertia of an object would be produced by increasing the
mass of the object from 1.0 kg to 2.0 kg
A 15-kilogram cart is at rest on a horizontal surface. A 5-kilogram box is placed in the cart. Compared to the mass and inertia of the cart, the cart-box system has
more mass and more inertia
An unbalanced force of 2 newtons applied to a given mass produces an acceleration. If an unbalanced force of 1 newton is applied to the same mass, the acceleration produced will be
one-half as much
A woman with horizontal velocity v1 jumps o a dock into a stationary boat. After landing in the boat, the woman and the boat move with velocity v2. Compared to velocity v1, velocity v2 has
smaller magnitude and the same direction
A carpenter hits a nail with a hammer. Compared to the magnitude of the force the hammer exerts on the nail, the magnitude of the force the nail exerts on the hammer during contact is
the same
A mosquito ying over a highway strikes the windshield of a moving truck. Compared to the magnitude of the force of the truck on the mosquito during the collision, the magnitude of the force of the mosquito on the truck is
the same
A test booklet is sitting at rest on a desk. Compared to the magnitude of the force of the booklet on the desk, the magnitude of the force of the desk on the booklet is
the same
Compared to the inertia of a 0.10-kilogram steel ball, the inertia of a 0.20-kilogram Styrofoam ball is
twice as great
A 0.50-kilogram cart is rolling at a speed of 0.40 meter per second. If the speed of the cart is doubled, the inertia of the cart is
unchanged
A 12.0-kilogram cart is moving at a speed of 0.25 meter per second. After the speed of the cart is tripled, the inertia of the cart will be
unchanged
What is an essential characteristic of an object in equilibrium?
zero acceleration
