Newton's Second Law

A rightward force of 302 N is applied to a 28.6 kg crate to accelerate it across the floor. The

coefficient of dynamic friction between the crate and the floor is 0.750. Determine the acceleration of the crate. (Take g = 9.81ms^-2)

• 9.81ms^.2

• 7.94ms^-2

• 3.20ms^-2

• 91.6ms^-2

A 405N rightward force is use to drag a large box across the floor with a constant velocity of 0.678 m/s. The coefficient of dynamic friction between the box and the floor is 0.795. Determine the mass of the box. (Take g = 9.81ms^-2)

• 51.9kg

• 50.9kg

• 509kg

• 41.3kg

A 6.58 x 103 N upward tension force is exerted on a 521kg downward moving freight elevator.

Determine the acceleration of the elevator.

(Take g = 9.81ms^-2)

• 2.82ms^-2 upwards

• 2.82ms^-2 downwards

• 12.6ms^-2 upwards

• 12.6ms^-2 downwards

• Not enough information in the question

A basketball star exerts a force of 3225 N (average value) upon the gym floor in order to accelerate his 76.5 kg body upward.

(a) Determine the acceleration of the player.

(Take g = 9.81ms^-2)

• Not enough force to overcome gravity

• 42.2ms^-2

• 32.2ms^-2

• 32.3ms^-2

Tags

NGSS.MS-PS2-2

A basketball star exerts a force of 3225 N (average value) upon the gym floor in order to accelerate his 76.5 kg body upward.

(b) Determine the final speed of the player if the force endures for a time of 0.150 second

(Take g = 9.81ms^-2)

• Not enough information

• 4.85ms^-1

• 484ms^-1

• 4.85ms^-2

One kg multiplied by m/s² can also be expressed as 1 __________.

• direction
• mass
• kilogram²
• newton

Tags

NGSS.HS-PS2-1

If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration?  (F=ma)

• The one with a mass of .78 kg will have the greatest acceleration.
• The one with a mass of .52 kg will have the greatest acceleration.
• They will both accelerate at the same rate.

Tags

NGSS.MS-PS2-2

A force of 90N is applied to each cart below, which one will accelerate the fastest?

• Cart 1
• Cart 2
• Cart 3 
• Cart 4

Tags

NGSS.MS-PS2-2