Net Forces - Level 1 Science

Explain what a net force is.

• It is the smallest force acting on an object

• It is the biggest force acting on an object

• It is when no forces act on an object

• It is the final force that acts on an object once all the other forces acting have been added together.

Raj (21 kg) is accelerating at 3ms^-2 during a game of chase. Calculate the net force causing him to do that.

• 210 N

• 310 N

• 630 N

• 63 N

What a night. The 0.20 kg cork explodes with an acceleration of 1000ms^-2 . Calculate the net force causing the change?

• 0.08 kg

• 0.13 kg

• 0.26 kg

• 0.016 kg

Raj (21 kg) uses 115.5 N of force to decelerate him before he hit a wall. Calculate his deceleration

• 2425.5 ms^-2

• 11 ms^-2

• 0.18 ms^-2

• 5.5 ms^-2

Justice uses 54 N of force to accelerate him at 3 ms^-2 . Calculate his mass.

• 180 kg

• 1620 kg

• 162 kg

• 18 kg

Calculate the net force Ned uses to accelerate his head at 0.32 ms^-2 with a mass of 4.9 kg towards his hands during the kissing seen^!

• 156.8 N

• 2.531 N

• 15.68 N

• 1.568 N

Every sheep (45 kg) is now used for moving grass. They are pushed forward with 11.25 N of force. What is the acceleration of the sheep?

• 0.25 ms^-2

• 2.5 ms^-2

• 0.025 ms^-2

• 40 ms^-2

Every sheep (35 kg) is now used for moving grass. They are pushed forward with 20 N of force. The grass provides 2.5 N of frictional force. What is the acceleration of the sheep?

• 0.25 ms^-2

• 2.5 ms^-2

• 0.5 ms^-2

• 5.0 ms^-2

What a night. The Cork explodes with an acceleration of 2500 ms^-2 with a net force of 200 N acting. But that was after friction had been overcome with a force of 125 N. What was the mass of the cork?

• 0.08 kg

• 0.13 kg

• 0.26 kg

• 0.016 kg

What a night. The Cork explodes with an acceleration of 2500 ms^-2 with total force of 1500 N acting. The mass of the cork was 0.2 kg of the cork? Calculate the friction that was acting on the cork.

• 7500 N

• 500 N

• 5000 N

• 750 N