An object moves in a circle of radius 5 m with a speed of 10 m/s. What is the centripetal acceleration? A) 10 m/s210 \, \text{m/s}^2B) 20 m/s220 \, \text{m/s}^2C) 50 m/s250 \, \text{m/s}^2D) 100 m/s2100 \, \text{m/s}^2

Which of the following statements is true for an object in free fall near Earth’s surface? A) The acceleration is zero.B) The velocity increases by 9.8 m/s every second.C) The displacement decreases uniformly.D) The speed remains constant.

According to Newton’s first law, what happens to an object in motion with no net external force? A) It accelerates.B) It slows down.C) It moves with constant velocity.D) It stops eventually.

A force of 50 N is applied to a 20 kg block on a horizontal surface. If μk=0.2\mu_k = 0.2, what is the net force acting on the block? (Take g=9.8 m/s2g = 9.8 \, \text{m/s}^2) A) 6 N6 \, \text{N}6NB) 10 N10 \, \text{N}10NC) 14 N14 \, \text{N}14ND) 30 N30 \, \text{N}30N

Which of the following statements about static friction is true? A) It is always less than kinetic friction.B) It acts only when the object is in motion.C) It is generally greater than kinetic friction.D) It is independent of the nature of the surfaces in contact.

A car travels 100 m in 5 seconds. What is its average speed? A) 10 m/sB) 20 m/sC) 25 m/sD) 50 m/s

A 2 kg object moves in a horizontal circle of radius 3 m at a constant speed of 6 m/s. What is the centripetal force acting on the object?

The concept of scarcity as used by economists refers to

The basic economic problem is

Consider two countries (France and the United States) that use labor as an input to produce two goods: wine and cloth. In France, one hour of a worker’s labor can produce either 5 units of cloth or 10 units of wine. In the US, one hour of a worker’s labor can produce either 20 units of cloth or 20 units of wine. The information provided is illustrated as follows:   Cloth Wine France 5 10 The United States 20 20   Which of these countries enjoys a comparative advantage in the production of wine?