ROTATIONAL MOTION

What is the force exerted by the ground on each front wheel of the car?

• 1800 N
• 3675 N
• 5000 N
• 7350 N

For the same car, what fraction of the weight is supported by the back wheels?

• 5/12
• 1/2
• 7/12
• 1/3

A car weighs 1800 kg. The distance between its front and back axles is 1.8 m. Its center of gravity is 1.05 m behind the front axle. What fraction of the car's weight is supported by the front wheels?

• 1/2
• 7/12
• 5/12
• 2/3

A 2 m long bar is suspended by strings at 36.9° and 53.1° to the vertical. Where is the center of gravity located from the left end?

• 1.2 m
• 0.5 m
• 0.8 m
• 1.5 m

In the suspended bar problem, what is the significance of the string angles 36.9° and 53.1°?

• They indicate the material strength
• They are arbitrary
• They determine the color
• They determine the components of the tension forces