Retardation

Q. Question 2
A bus decreases its speed from $80km{h}^{-1}to60km{h}^{-1}$ in 5 s. Find the acceleration of the bus.

Q.

What is retardation ?

1. average speed

2. negative acceleration

3. acceleration

4. state of rest

Q.

Rate of change of velocity is

1. acceleration

2. time taken

3. distance

4. motion

Q. What is retardation hurry up speed

Q. Why do objects move when we apply force?

Q.

Why and How do the wheels of a vehicle slows and stop when the brake shoe is pressed?

Q. Negative acceleration of a body is generally associated with the body:

1. At rest
2. Slowing down
3. Speeding up
4. At constant velocity

Q.

A person sitting in a bus saw a bag sliding forward . This means that the bus is___________

1. Moving at constant speed

2. accelerating

3. retarding

4. At rest

Q. How will you determine instaneous velocity and instaneous acceleration?

Q. A car decreases its speed from $80kmh{r}^{-1}$ to $60kmh{r}^{-1}$ in $5$ seconds. The acceleration of the car is:

1. $-1.11m{s}^{-2}$
2. $1.11m{s}^{-2}$
3. $-1.62m{s}^{-2}$
4. $1.62m{s}^{-2}$

Q.

If the acceleration of an object is negative then

1. the object is gaining speed.

2. the object is losing speed.

3. the object is at rest.

4. the object cannot stop.

Q. what is instantaneous acceleration

Q. Can direction be change rather than velocity changes by unequal magnitude in non uniform acceleration??

Q.

A car decreases its speed from 80 km/h to 60 km/h is 5 second. The acceleration of the car is :

1. -1.11 $m/s^2$

2. 1.12 $m/s^2$

3. 1.11 $m/s^2$

4. -1.14 $m/s^2$

Q.

When acceleration is in opposite direction to velocity, ___ .

1. velocity increases.

2. velocity is zero.

3. velocity decreases.

4. velocity remains constant.

Q.

A bus decreases its speed from $80kmh{r}^{-1}$ to $60kmh{r}^{-1}$ in 5 seconds. What is the acceleration of the bus?

1. 2.11 m/s²

2. 1.11 m/s²

3. 0 m/s²

4. 2.22m/s²

Q.

The rate at which velocity decreases is called_________

1. uniform speed

2. retardation

3. displacement

4. jerk