Newton's Laws and Forces

In this lesson, students learn to solve a worksheet related to forces acting on a car. The tutorial covers identifying and matching different forces, calculating mass and resultant force, and determining acceleration using Newton's second law. The lesson concludes with solving a final problem involving forward driving force and resistive forces.

What is the direction of the normal reaction force acting on a car moving in a straight line?

• Upward

• Downward

• Forward

• Backward

Which force acts in the opposite direction to the car's motion?

• Driving force

• Gravitational force

• Normal reaction force

• Air resistance

How is the gravitational force on the car calculated?

• By multiplying mass with acceleration

• By dividing force by mass

• By adding all forces acting on the car

• By multiplying mass with gravitational field strength

What is the mass of the car if the gravitational force is 8000 N and the gravitational field strength is 10 N/kg?

• 1000 kg

• 800 kg

• 400 kg

• 600 kg

How do you calculate the resultant force on the car?

• By dividing mass by acceleration

• By adding all forces

• By subtracting air resistance from driving force

• By subtracting gravitational force from normal force

What is the acceleration of the car if the resultant force is 400 N and the mass is 800 kg?

• 0.5 m/s²

• 1.0 m/s²

• 2.0 m/s²

• 0.25 m/s²

What is the forward driving force required if the resistive force is 2000 N and the resultant force is 1600 N?

• 3600 N

• 3200 N

• 4000 N

• 2800 N

If the car's mass is 800 kg and the acceleration is 1.4 m/s², what is the forward driving force required?

• 1120 N

• 1520 N

• 1920 N

• 1320 N

What is the combined force of air resistance and friction acting backward if it is given as 400 N?

• 400 N

• 600 N

• 800 N

• 1000 N

According to Newton's second law, how is the net force related to mass and acceleration?

• Net force is the sum of mass and acceleration

• Net force is the difference between mass and acceleration

• Net force is the ratio of mass to acceleration

• Net force is the product of mass and acceleration