Question

1. a 2,000- kg car is sitting at rest in a parking lot. A bike and rider with a total mass of 60 kg are traveling along a road at 10km/h. Which system has more inertia?why?
a. the car has more inertia, as its mass is greater than the mass of the bike
b. the bike has more inertia, as its mass is greater than the mass of the car
c. the car has more inertia, as its mass is less than the mass of a bike
d. the bike has more inertia, as its mass is less than the mass of the car.

2. which of the following statement define tge newtons second law of motion?
a. acceleration deoends on the objects mass and on the net force acting on the object
b. an object at rest will remain at rest, and an object moving at a constant velocity will continue moving at a constant velocity, unless is acted upon by an unbalanced force
c. if one object exerts a force on another object, then the second object exerts a force
d. none of the above

3. Which of the following statements define the newtons third law of motion?
a. acceleration depends on the objects mass and on the net force acting on the object
b. if one object exerts a force on another object, then the second object exerts a force
c. an object at rest will remain at rest, and an object moving at a constant velocity will continue moving at a constant velocity, unless is acted upon by an unbalanced force
d. none of the above​

Answer 1

Answer:

1. a 2,000- kg car is sitting at rest in a parking lot. A bike and rider with a total mass of 60 kg are traveling along a road at 10km/h. Which system has more inertia?why?

a. the car has more inertia, as its mass is greater than the mass of the bike

b. the bike has more inertia, as its mass is greater than the mass of the car

c. the car has more inertia, as its mass is less than the mass of a bike

d. the bike has more inertia, as its mass is less than the mass of the car.

2. which of the following statement define tge newtons second law of motion?

a. acceleration deoends on the objects mass and on the net force acting on the object

b. an object at rest will remain at rest, and an object moving at a constant velocity will continue moving at a constant velocity, unless is acted upon by an unbalanced force

c. if one object exerts a force on another object, then the second object exerts a force

d. none of the above

3. Which of the following statements define the newtons third law of motion?

a. acceleration depends on the objects mass and on the net force acting on the object

b. if one object exerts a force on another object, then the second object exerts a force

c. an object at rest will remain at rest, and an object moving at a constant velocity will continue moving at a constant velocity, unless is acted upon by an unbalanced force

d. none of the above

Answer 2

1. a. The car has more inertia, as its mass is greater than the mass of the bike.

2. a. Acceleration depends on the object's mass and on the net force acting on the object.

3. b. If one object exerts a force on another object, then the second object exerts a force.

Explanation:

Question1

• According to first law of motion, "A body tends to stay in state of rest or in state of motion unless and until an external force is applied on it."

• It gives the concept of inertia. And mass is a measure of inertia. The property of a body to resist any change in its state is called inertia.

• So, more the mass, more is the inertia of the body. Here, irrespective of the state of body, the inertia will be more for the system whose mass is more. The car being of higher mass, has more inertia.

Question2

• According to second law of motion, " force is defined as change in momentum with time".

• Momentum is change mass times velocity.

• So, expression for force is:

$F=\frac{mv-mu}{t}=m(\frac{v-u}{t} ) =ma$

where $m$ is the mass of body and $a$ is the acceleration.

• So, acceleration depends on the force acting on the body.

Question3

• According to third law of motion, "For every action of force, there is an equal and opposite reaction".

• It gives direction of force and according to this law, force comes in pair.

• So, if one object exerts a force on another object, then the second object exerts a force which is equal in magnitude and opposite in direction.