According to Newton's second law: Which of the following option is true. Choose all that apply.   A. Acceleration is proportional to the net force.   B. Acceleration is equal to the mass .   C. Acceleration is inversely proportional to the mass.   D. Acceleration is equal to the net force.

2. While driving down a road in your car that has a mass of 1300 kg, you notice that your speed is 25 m/s. After going a distance of 1.0 km, you notice your speed is then 27 m/s. What was the magnitude of the force responsible for the acceleration over that distance, assuming that the acceleration was constant?

1. A pair of crates are in contact with one another on a horizontal frictionless surface. The first crate has a mass of 3.0kg, while the second has a mass of 12kg. You push on the 3.0-kg crate to the right with a force of 60N, causing it to press against the second crate and move them both. What is the acceleration of each crate? What is the force that the lighter crate exerts on the heavier crate as it presses against it?

3. A horse is tethered to a cart to pull it forward. A student claims, "According to Newton's third law, when the horse pulls forward on the cart, the cart will also pull backwards on the horse. The two objects are attached together, so they cannot accelerate." Discuss the validity of this statement.

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1. Two people pushing a stalled car. The mass of the car is 1750 kg. One person applies a force of 265 N to the car, while the other applies a force of 395 N. Both forces act in the same direction. A third force of 450 N also acts on the car, but in an opposite direction opposite to that in which the pavement opposes the motion of the tires. If the mass of the car is 1750 kg, find the acceleration of the car.

24. A pickup truck with mass 980 kg is initially at rest. The truck accelerates to a speed of 95 km/hr within a distance of 60 meters. What the direction and size of the force that acts on the truck? a. b. If the truck were carrying a load of 200 kg, what new force would be required to achieve the same acceleration?

1. A net force of 2500 N acts on an African male elephant with a mass of 7000 kg. How large is the acceleration of the African male elephant?

13. An object sits at rest on a ramp. As the angle of inclination of the ramp increases, the object suddenly begins to slide. Which of the following explanations best accounts for the object's movement? a. The coefficient of static friction has decreased sufficiently. b. The force of gravity acting on the object has increased sufficiently. c. The component of gravity along the ramp has increased sufficiently. d. The friction has decreased sufficiently while the normal force has remained unchanged. e. The normal force has increased sufficiently.

60. An 8.0-kilogram block and a 2.0-kilogram block rest on a horizontal frictionless surface. When horizontal force F is applied to the 8.0-kilogram block, it accelerates at 5.0 meters per second east. If the same force was applied to the 2.0-kilogram block, the magnitude of the block's acceleration would be (1) 1.3 m/s2 (2) 2.5 m/s2 (3) 10. m/s2 (4) 20. m/s SHOW WORK, CIRCLE ANSWER, WRITE NEAT