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Quiz: F=ma practice problems and Newton's Laws

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An object of mass 300 kg is observed to accelerate at the rate of 4 m/s2. Calculate the force required to produce this acceleration.

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6 years ago

Date created

Mar 14, 2020

Cards (31)

Section 1

(31 cards)

An object of mass 300 kg is observed to accelerate at the rate of 4 m/s2. Calculate the force required to produce this acceleration.

Front

1,200 N

Back

Which of the following masses require the greatest force to be moved? A. 30 kg C. 16 kg B. 52 kg D. 7 kg

Front

B because the higher the mass, the more force is required.

Back

Use the force triangle to solve for mass

Front

m = F/a

Back

What is the force on a 1000 kg elevator that is falling freely at 9.8 m/sec2?

Front

9,800 N

Back

A force of 20 N acts upon a 5 kg block. Calculate the acceleration of the object

Front

4 m/s2

Back

A bowling ball rolled with a force of 15 N accelerates at a rate of 3 m/sec2; a second ball rolled with the same force accelerates 4 m/sec2. What are the masses of the two balls?

Front

Bowling Ball #1: 5 kg Bowling Ball #2: 3.75 kg

Back

3. The law requires all people riding in a car to wear seat belts. If the car suddenly stops, the seat belts hold the passengers in place. How does Newton's first law of motion apply when a person is not wearing a seat belt? A. The passengers will continue moving forward due to inertia. B. The passengers will move backward into the seat. C. The passengers will lean into another passenger's seat. D. The passengers will not be affected by the sudden stop of the car.

Front

A because Newton's first law of Inertia says that an object in motion will stay in motion until an outside force acts on it.

Back

A __________ is required to change the motion of an object

Front

Force

Back

Use the force triangle to solve for acceleration

Front

a = F/m

Back

What is the unit for acceleration?

Front

meters/second2 (m/s2)

Back

Find the acceleration of an object with 1 kg and 1 N.

Front

1 m/s2

Back

What is the unit for mass?

Front

Kilograms (kg)

Back

Use the force triangle to solve for Force

Front

F = m x a

Back

How much force is needed to accelerate a 66 kg skier at 2 m/sec2?

Front

132 N

Back

Find the acceleration of an object with 4 N and 0.2 kg.

Front

20 m/s2

Back

What is the unit for force?

Front

Newtons (N)

Back

A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec2. What is the mass of the object?

Front

50 kg

Back

Miguel uses 3000 Newtons to push Edwin in a wheel chair. Edwin accelerates at 50 m/sec2 before slowing down to turn a corner. What is the mass of Edwin and the wheelchair?

Front

60 kg

Back

What is Newton's Third Law?

Front

Every action has an equal and opposite reaction.

Back

inertia

Front

the tendency for objects not to change their motion (if moving, stay moving; if at rest, stay at rest)

Back

What is the acceleration of a 50 kg object pushed with a force of 500 Newtons?

Front

10 m/s2

Back

Find the mass of an object with 10 N and 1 m/s2.

Front

10 kg

Back

Rey is sitting on a couch. Gravity exerts (uses) a downward force on him. Based on Newton's Law of Action-Reaction, the other force acting on Rey is the - A. Upward force of momentum B. Upward force of the couch C. Downward force of the floor D. Downward force of air pressure

Front

B because Newton's Law of Action-Reaction says that every action has an equal and opposite reaction. The couch is pushing back on Rey with an equal and opposite force.

Back

Find the mass of an object with 17 N and an acceleration of 1.7 m/s2.

Front

10 kg

Back

1. How does Newton's first law of motion apply to a ball rolling across the gym floor after an unbalanced force is applied? A. The ball will stop at the line halfway across the gym. B. The ball will continue to roll until an unbalanced force is applied. C. The ball will start bouncing until it hits the wall. D. The ball will roll in a zigzag pattern to the other end of the gym.

Front

B because Newton's first law of Inertia says that an object in motion will stay in motion until an outside force acts on it.

Back

A person pushes on a door with a force of 50 N to the right. The door is stuck and does not move. What size and in what direction is the force of the door acting on the person?

Front

The door pushes with a force of 50 N to the left on the person (equal and opposite the direction and size of the force of the person pushing on the door).

Back

The mass of a large car is 1000 kg. How much force would be required to accelerate the car at a rate of 3 m/sec2?

Front

3,000 N

Back

What is Newton's Second Law?

Front

Force = Mass x Acceleration.

Back

What is Newton's First Law of Inertia?

Front

An object at rest stays at rest and an object in motion stays in motion unless an outside force acts on it.

Back

A football player throws a football 30 meters/second2 using 600 Newtons of force. What was the mass of the football?

Front

20 kg

Back

Find the force of an object with 8 kg and 3 m/s2

Front

24 N

Back