1) How much work is needed to change the speed of a 1837 kg sport utility vehicle from 15.0 m/s to 60 m/s? (1 MJ = 106 Joules) a. 1.10 MJ Ob.2.7 MJ O C. 2.2 MJ O d. 3.1 MJ e. 4.0 MJ

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Chapter1: Units, Trigonometry. And Vectors
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### Physics Problem

### Problem Statement:
1) How much work is needed to change the speed of a 1837 kg sport utility vehicle from 15.0 m/s to 60 m/s? (1 MJ = \(10^6\) Joules)

### Multiple Choice Options:
a. 1.10 MJ  
b. 2.7 MJ  
c. 2.2 MJ  
d. 3.1 MJ  
e. 4.0 MJ  

*Note:* There are no graphs or diagrams included in this problem statement. It consists solely of the question and multiple-choice answers.

### Explanation:

This problem involves calculating the kinetic energy change required to accelerate the vehicle and thus the work done on the vehicle. 

The formula for kinetic energy (K.E) is given by:
\[ K.E = \frac{1}{2}mv^2 \]

Where:
- \( m \) is the mass of the vehicle (1837 kg)
- \( v \) is the velocity

The work done (\( W \)) to change the speed of the vehicle can be determined by finding the difference in kinetic energy at the two speeds:

\[ W = \Delta K.E = K.E_{\text{final}} - K.E_{\text{initial}} \]

\[ K.E_{\text{initial}} = \frac{1}{2} \times 1837 \times (15)^2 \]
\[ K.E_{\text{final}} = \frac{1}{2} \times 1837 \times (60)^2 \]

Substitute the values to find the kinetic energy at both speeds, then find the difference to determine the work done.
Transcribed Image Text:### Physics Problem ### Problem Statement: 1) How much work is needed to change the speed of a 1837 kg sport utility vehicle from 15.0 m/s to 60 m/s? (1 MJ = \(10^6\) Joules) ### Multiple Choice Options: a. 1.10 MJ b. 2.7 MJ c. 2.2 MJ d. 3.1 MJ e. 4.0 MJ *Note:* There are no graphs or diagrams included in this problem statement. It consists solely of the question and multiple-choice answers. ### Explanation: This problem involves calculating the kinetic energy change required to accelerate the vehicle and thus the work done on the vehicle. The formula for kinetic energy (K.E) is given by: \[ K.E = \frac{1}{2}mv^2 \] Where: - \( m \) is the mass of the vehicle (1837 kg) - \( v \) is the velocity The work done (\( W \)) to change the speed of the vehicle can be determined by finding the difference in kinetic energy at the two speeds: \[ W = \Delta K.E = K.E_{\text{final}} - K.E_{\text{initial}} \] \[ K.E_{\text{initial}} = \frac{1}{2} \times 1837 \times (15)^2 \] \[ K.E_{\text{final}} = \frac{1}{2} \times 1837 \times (60)^2 \] Substitute the values to find the kinetic energy at both speeds, then find the difference to determine the work done.
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