When does frictional force become independent of the surface area of contact? A) AlwaysB) Only in the case of kinetic frictionC) Only in the case of static frictionD) When the object moves at constant speed

Hooke’s Law applies to: A) Perfectly elastic materialsB) Plastic deformationC) Both elastic and plastic materialsD) Only brittle materials

A car starts from rest and accelerates uniformly at 2 m/s² for 5 seconds. What is its final velocity? A) 5 m/sB) 10 m/sC) 15 m/sD) 20 m/s

A cannon fires a projectile at 50 m/s at an angle of 60°. What is the maximum height reached? (Take g=10 m/s2g = 10 \, \text{m/s}^2) A) 50 mB) 62.5 mC) 75 mD) 125 m

A vehicle decelerates uniformly from 30 m/s to rest in 10 seconds. What is its acceleration? A) −3 m/s2-3 \, \text{m/s}^2B) 3 m/s23 \, \text{m/s}^2C) −2 m/s2-2 \, \text{m/s}^2D) 2 m/s22 \, \text{m/s}^2

A 5 kg object is suspended by a rope. What is the tension in the rope? (Take g=9.8 m/s2g = 9.8 \, \text{m/s}^2) A) 49 N49 \, \text{N}B) 9.8 N9.8 \, \text{N}C) 5 N5 \, \text{N}D) 98 N98 \, \text{N}

A box is pulled with a force of 50 N at an angle of 30° above the horizontal. If the horizontal component of the force moves the box, what is this component? A) 25 N25 \, \text{N}B) 43.3 N43.3 \, \text{N}C) 50 N50 \, \text{N}D) 75 N75 \, \text{N}

A 2 kg object is swung in a horizontal circle of radius 3 m with a speed of 4 m/s. What is the magnitude of the centripetal force? A) 8 N8 \, \text{N}B) 16 N16 \, \text{N}C) 32 N32 \, \text{N}D) 64 N64 \, \text{N}

If the radius of a circular path is doubled while keeping the speed constant, the centripetal acceleration will: A) Remain the sameB) DoubleC) Be halvedD) Be quartered

A spring is stretched by 0.2 m under a load of 50 N. What is the spring constant? A) 100 N/m100 \, \text{N/m}B) 250 N/m250 \, \text{N/m}C) 50 N/m50 \, \text{N/m}D) 500 N/m500 \, \text{N/m}