Go on. Explore!

lvl 0 • 0 xp

lvl 1

Home Market Decks Interests

Physics

memorize.ai (lvl 286)

(0)

34 cards

()

Section 1

Preview this deck

Neglecting air resistance, how fast must you toss a ball straight up in order for it to take 6 seconds to return to its initial level?

Front

1 / 34

Physics

0.0

0 reviews

5			0
4			0
3			0
2			0
1			0

Active users

All-time users

Favorites

Last updated

7 years ago

Date created

Mar 1, 2020

Cards (34)

Section 1

(34 cards)

Neglecting air resistance, how fast must you toss a ball straight up in order for it to take 6 seconds to return to its initial level?

Front

30 m/s

Back

A 10-kilogram block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N. The acceleration of the block is

Front

speed

Back

A tree stump is pulled northward by a 10-N force at the same time a 25-N force pulls it southward. The resultant force has a magnitude of

Front

15 N

Back

A rock is thrown vertically into the air. At the top of its path the net force on it is

Front

1 mg

Back

A large and a small person wish to parachute at equal terminal velocities. The larger person should

Front

get a larger

Back

The newton is a unit of

Front

force

Back

The time it takes a car to attain a speed of 30 m/s when accelerating from rest at 2 m/s2 is

Front

15s

Back

Scotty Skydiver of mass 100 kg experiences air resistance of 500 N, and an acceleration of about

Front

.5 g

Back

Neglecting air resistance, a ball projected straight upward so it remains in the air for 10 seconds needs an initial speed of

Front

50 m/s

Back

A car has a mass of 1000 kg and accelerates at 2 m/s2. What net force is exerted on the car?

Front

2000 N

Back

A hockey puck sliding at constant velocity across the ice is

Front

in equillibrium

Back

A tow truck exerts a force of 3000 N on a car, which then accelerates at 2 m/s2. What is the mass of the car

Front

1500 kg

Back

When a ball thrown straight upwards reaches the very top of its path, its acceleration is

Front

10 m/s^2

Back

A 500-N parachutist opens his chute and experiences an air resistance force of 800 N. The net force on the parachutist is then (upward or downward)

Front

300 N upward

Back

The vertical height attained by a basketball player who achieves a hang time of a full 1 s is about

Front

1.2m

Back

A rock weighs 30 N on Earth and another rock weighs 30 N on the Moon. Which rock has the greater mass?

Front

one on the moon

Back

You stand on your skateboard and exert a 50-N push on the wall next to you. If your mass is 60 kg you'll momentarily accelerate from the wall at about

Front

.8 m/s^2

Back

Action and reaction pairs of forces

Front

always act simultaneously

Back

A force is a vector quantity because it has both

Front

magnitude and direction

Back

The force required to maintain a constant velocity for an astronaut in free space is equal to

Front

0

Back

A kilogram is a measure of an object's

Front

mass

Back

a synthesis of a large body of well-tested knowledge

Front

theory

Back

A rock is thrown vertically into the air. At the top of its path, its acceleration is

Front

10 m/s^2

Back

An educated scientific guess

Front

hypothesis

Back

When a cannonball is fired from a cannon, which undergoes the greater acceleration?

Front

cannonball

Back

property of matter

Front

inertia

Back

What is the acceleration of a car that starts from rest and 5 seconds later reaches a speed of 20 m/s?

Front

4 m/s^2

Back

The force with which Earth pulls on the Moon is

Front

equal in magnitude to the force that Moon pulls on earth

Back

A pot that falls from a ledge and hits the ground 45 m below hits the ground at

Front

60 m/s

Back

To produce an acceleration to a system there

Front

must be a net force on the object

Back

A block is dragged without acceleration in a straight-line path across a level surface by a force of 6 N. What is the force of friction between the block and the surface?

Front

6 N

Back

A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the deceleration of the car?

Front

220 m/s^2

Back

A 10-kilogram block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N. The acceleration of the block is

Front

1 m/s^2

Back

The first scientist to introduce the concept of inertia was

Front

Galileo

Back