An engineering team needs to design a system to stop a runaway cart on a track. Which modification is based on the principle of increasing friction?

Streamlining the cart's body to significantly reduce its air resistance profile.

Replacing the smooth track surface with a rougher material like gravel.

Adding powerful magnets to the bottom of the cart and the track to cause repulsion.

Installing a large sail on the cart to catch the wind and slow it down.

According to the Force-Velocity Model, what is the direct effect of increasing the force of friction acting on a moving object?

It causes a greater rate of deceleration.

It increases the object's forward momentum.

It makes the contact surface smoother.

Increased surface roughness → decreased friction → increased speed.

Increased surface roughness → increased friction force → greater deceleration.

Increased surface roughness → increased mass → greater deceleration.

Increased surface roughness → decreased deceleration → longer stopping distance.

Decreasing mass has absolutely no effect on how quickly an object can stop.

Increasing friction creates a larger opposing force, which directly causes a greater change in velocity.

Lighter cars are known to have braking systems that are fundamentally less efficient than those in heavier cars.

The primary factor in stopping is air resistance, which is only increased by making the car larger, not lighter.