1. A car of mass 1000 kg is traveling at a constant speed of 20 m/s. Calculate the force required to keep the car moving at this speed.
To calculate the force required to keep the car moving at a constant speed, we can use the equation:
Force = mass x acceleration
Since the car is traveling at a constant speed, the acceleration is zero. Therefore, the force required to keep the car moving at this speed is also zero.
2. A ball is kicked with a force of 20 N. If the mass of the ball is 0.5 kg, what is the acceleration of the ball?
To calculate the acceleration of the ball, we can use the equation:
Force = mass x acceleration
Rearranging the equation, we can find the acceleration:
acceleration = Force / mass
Plugging in the values:
acceleration = 20 N / 0.5 kg
acceleration = 40 m/s²
Therefore, the acceleration of the ball is 40 m/s².
3. A crate of mass 50 kg is pushed horizontally with a force of 200 N. What is the acceleration of the crate?
To calculate the acceleration of the crate, we can use the equation:
Force = mass x acceleration
Rearranging the equation, we can find the acceleration:
acceleration = Force / mass
Plugging in the values:
acceleration = 200 N / 50 kg
acceleration = 4 m/s²
Therefore, the acceleration of the crate is 4 m/s².
Force and Motion Sample Work
1 answer