Advertisements
Advertisements
प्रश्न
An object of mass 16 kg is moving with an acceleration of 3 m/s2. Calculate the applied force. If the same force is applied to an object of mass 24 kg, how much will be the acceleration?
Advertisements
उत्तर
Given: m1 = 16 kg, a1 = 3 m/s2, m2 = 24 kg
Find: a2 = ?, F = ?
Applied force, F = m1a1 = 16 kg × 3 m/s2 = 48 N
∴ F = m2a2
∴ Acceleration, `"a"_2 = "F"/"m"_2`
`= (48 "N")/(24 "kg")`
= 2 m/s2
APPEARS IN
संबंधित प्रश्न
A toy car initially moving with uniform velocity of 18 km h-1 comes to a stop in 2 s. Find the retardation of the car in S.I. units.
Figure shows the velocity-time graphs for two cars A and B moving in the same direction. Which car has greater acceleration? Give reasons to your answer.
A body falls freely from a certain height. Show graphically the relation between the distance fallen and square of time. How will you determine g from this graph?
A car travels with uniform velocity of 25 m s-1 for 5 s. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 s. Find:
- The distance which the car travels before the brakes are applied,
- Retardation and
- The distance travelled by car after applying the brakes.
A ball is rolling from A to D on a flat and smooth surface. Its speed is 2 cm/s. On reaching B, it was pushed continuously up to C. On reaching D from C, its speed had become 4 cm/s. It took 2 seconds for it to go from B to C. What is the acceleration of the ball as it goes from B to C?
When is the acceleration due to gravity negative?
A truck running at 90 kmh−1, is brought to rest over a distance of 25 m. Calculate the retardation and time for which brakes are applied.
What is the SI unit of acceleration?
Distinguish between uniformly and non-uniformly accelerated motions.
Can you use the relation [B1]?
The distance covered by a body is directly proportional to the square of the time elapsed. What can you say about its acceleration?
A body has an acceleration of -3.5 ms-2. What is its retardation?
The graph shows how the velocity of a scooter varies with time in 50 s.
Work out: Deceleration
If the velocity of a body does not change, then its acceleration is ______.
The acceleration of the body that moves with a uniform velocity will be ______.
A bus accelerating with 4ms-2 changes its speed from 60ms_1 to a certain value in 5s. The final speed is ______.
A quantity has a value of 16ms-2. It is the ______.
Assertion: When a body is subjected to a uniform acceleration, it is always moving in a straight line.
Reason: Motion may be straight-line motion or circular motion.
What is the difference between uniform acceleration and non–uniform acceleration?
