Hukum Gerakan Newton Kedua

If the mass of an object is 10 kg and a force of 50 N is applied to it, what is the acceleration of the object?

Answer explanation

Using Newton's second law, F = ma, we can find acceleration (a) by rearranging the formula: a = F/m. Here, F = 50 N and m = 10 kg, so a = 50 N / 10 kg = 5 m/s². The acceleration of the object is 5 m/s².

A vehicle with a mass of 1,200 kg is subjected to a force of 3,600 N. Calculate its acceleration.

Answer explanation

Using Newton's second law, F = ma, we can rearrange to find acceleration (a = F/m). Here, a = 3600 N / 1200 kg = 3 m/s². Thus, the vehicle's acceleration is 3 m/s².

A worker pushes a box with a force of 30 N. The box has a mass of 10 kg. Calculate the acceleration of the box.

Answer explanation

Using Newton's second law, F = ma, we can find acceleration (a). Here, F = 30 N and m = 10 kg. Thus, a = F/m = 30 N / 10 kg = 3 m/s². The acceleration of the box is 3 m/s².

Two forces, 40 N and 30 N, are applied to a box with a mass of 20 kg in the same direction. Calculate the acceleration of the box.

Answer explanation

The net force is 40 N + 30 N = 70 N. Using F = ma, acceleration a = F/m = 70 N / 20 kg = 3.5 m/s². Thus, the acceleration of the box is 3.5 m/s².

An object with a mass of 15 kg is pushed with a force of 60 N, but a frictional force of 15 N acts against the direction of motion. Calculate the acceleration of the object.

Answer explanation

Net force = applied force - friction = 60 N - 15 N = 45 N. Using F = ma, acceleration a = F/m = 45 N / 15 kg = 3 m/s². The acceleration of the object is 3 m/s².

A bag of sand with a mass of 10 kg is pulled upwards with a force of 150 N. Assume g=9.8 m/s² as the acceleration due to gravity. Calculate the acceleration of the bag of sand.

Answer explanation

First, calculate the weight of the bag: weight = mass × g = 10 kg × 9.8 m/s² = 98 N. The net force is 150 N - 98 N = 52 N. Using F = ma, acceleration a = F/m = 52 N / 10 kg = 5.2 m/s².

A truck starts its journey with a mass of 5,000 kg. Part of the load, 500 kg, is dropped from the truck during its journey. If the force applied to the truck is 10,000 N, calculate the acceleration of the truck after the load is dropped.

Answer explanation

After dropping the load, the truck's mass is 4,500 kg. Using Newton's second law (F = ma), acceleration is a = F/m = 10,000 N / 4,500 kg = 2.22 m/s². Thus, the acceleration of the truck after the load is dropped is 2.22 m/s².

A car with a mass of 1,200 kg is moving at a speed of 20 m/s. It requires an additional acceleration of 1.5 m/s² to overtake another vehicle. What additional force needs to be applied to achieve this acceleration?

Answer explanation

To find the additional force, use F = m * a. Here, m = 1200 kg and a = 1.5 m/s². Thus, F = 1200 * 1.5 = 1800 N. Therefore, an additional force of 1800 N is needed to achieve the required acceleration.

What additional force is needed to achieve this acceleration?

Answer explanation

To find the additional force needed for a specific acceleration, use Newton's second law: F = ma. Calculate the force required by multiplying the mass by the desired acceleration, then subtract any existing forces to find the additional force.

Explain how the acceleration of the toy car will be affected.

Answer explanation

The acceleration of the toy car will increase if more force is applied or if the mass is reduced. According to Newton's second law, acceleration is directly proportional to force and inversely proportional to mass.