1. A car is decelerating at the rate of 3 km/s2. If its initial speed is 66 km/s

Question

1. A car is decelerating at the rate of 3 km/s2. If its initial speed is 66 km/s, how long will it take the car to come to a complete stop?

2. What is the gravitational force that two 100 kg persons exert on each other when standing 1m apart?

3. A top of rotational inertia 4.0 kg m2 receives a torque of 2.8 Nm from a physics professor. The angular acceleration of the body will be

4. A light bulb is plugged into a 120 Volt socket and has a resistance of 10 Ohms. How much current will flow through it when the light switch is turned on?

Explanation / Answer

1. A car is decelerating at the rate of 3 km/s2. If its initial speed is 66 km/s, how long will it take the car to come to a complete stop?

v = u + a*t

t = (v-u)/a = 0-66/-3 = 22 secs

2. What is the gravitational force that two 100 kg persons exert on each other when standing 1m apart?

F=GM1*M2/d

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.